<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/AssetRetirementObligations" xlink:href="evrg-20181231.xsd#AssetRetirementObligations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/AssetRetirementObligationsDetails" xlink:href="evrg-20181231.xsd#AssetRetirementObligationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/AssetRetirementObligationsTables" xlink:href="evrg-20181231.xsd#AssetRetirementObligationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/CommitmentsAndContingencies" xlink:href="evrg-20181231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesCapitalLeasesAssetsDetails" xlink:href="evrg-20181231.xsd#CommitmentsAndContingenciesCapitalLeasesAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesCapitalLeasesMinimumAnnualRentalPaymentsDetails" xlink:href="evrg-20181231.xsd#CommitmentsAndContingenciesCapitalLeasesMinimumAnnualRentalPaymentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesContractualCommitmentsDetails" xlink:href="evrg-20181231.xsd#CommitmentsAndContingenciesCommitmentsAndContingenciesContractualCommitmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesTables" xlink:href="evrg-20181231.xsd#CommitmentsAndContingenciesCommitmentsAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesEnvironmentalMattersDetails" xlink:href="evrg-20181231.xsd#CommitmentsAndContingenciesEnvironmentalMattersDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesOperatingLeasesDetails" xlink:href="evrg-20181231.xsd#CommitmentsAndContingenciesOperatingLeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ConsolidatedBalanceSheets" xlink:href="evrg-20181231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="evrg-20181231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="evrg-20181231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:href="evrg-20181231.xsd#ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfChangesInEquity" xlink:href="evrg-20181231.xsd#ConsolidatedStatementsOfChangesInEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfChangesInEquityParenthetical" xlink:href="evrg-20181231.xsd#ConsolidatedStatementsOfChangesInEquityParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfIncomeAndComprehensiveIncome" xlink:href="evrg-20181231.xsd#ConsolidatedStatementsOfIncomeAndComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/DocumentAndEntityInformation" xlink:href="evrg-20181231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/EquityCompensation" xlink:href="evrg-20181231.xsd#EquityCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/EquityCompensationDetails" xlink:href="evrg-20181231.xsd#EquityCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/EquityCompensationTables" xlink:href="evrg-20181231.xsd#EquityCompensationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/FairValueMeasurements" xlink:href="evrg-20181231.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/FairValueMeasurementsDebtDetails" xlink:href="evrg-20181231.xsd#FairValueMeasurementsDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/FairValueMeasurementsGainLossDetails" xlink:href="evrg-20181231.xsd#FairValueMeasurementsGainLossDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/FairValueMeasurementsNavDetails" xlink:href="evrg-20181231.xsd#FairValueMeasurementsNavDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/FairValueMeasurementsRecurringDetails" xlink:href="evrg-20181231.xsd#FairValueMeasurementsRecurringDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/FairValueMeasurementsTables" xlink:href="evrg-20181231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/Guarantees" xlink:href="evrg-20181231.xsd#Guarantees" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/GuaranteesDetails" xlink:href="evrg-20181231.xsd#GuaranteesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/IncomeTaxExpenseDetails" xlink:href="evrg-20181231.xsd#IncomeTaxExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/JointlyOwnedElectricUtilityPlants" xlink:href="evrg-20181231.xsd#JointlyOwnedElectricUtilityPlants" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/JointlyOwnedElectricUtilityPlantsDetails" xlink:href="evrg-20181231.xsd#JointlyOwnedElectricUtilityPlantsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/JointlyOwnedElectricUtilityPlantsTables" xlink:href="evrg-20181231.xsd#JointlyOwnedElectricUtilityPlantsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/LongTermDebt" xlink:href="evrg-20181231.xsd#LongTermDebt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/LongTermDebtDetails" xlink:href="evrg-20181231.xsd#LongTermDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/LongTermDebtLongTermDebtTables" xlink:href="evrg-20181231.xsd#LongTermDebtLongTermDebtTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergy" xlink:href="evrg-20181231.xsd#MergerOfGreatPlainsEnergyAndWestarEnergy" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyNarrativeDetails" xlink:href="evrg-20181231.xsd#MergerOfGreatPlainsEnergyAndWestarEnergyNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyPurchasePriceAllocationDetails" xlink:href="evrg-20181231.xsd#MergerOfGreatPlainsEnergyAndWestarEnergyPurchasePriceAllocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyScheduleAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:href="evrg-20181231.xsd#MergerOfGreatPlainsEnergyAndWestarEnergyScheduleAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyScheduleOfPreTaxCostsAndDeferralsDetails" xlink:href="evrg-20181231.xsd#MergerOfGreatPlainsEnergyAndWestarEnergyScheduleOfPreTaxCostsAndDeferralsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyTables" xlink:href="evrg-20181231.xsd#MergerOfGreatPlainsEnergyAndWestarEnergyTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyUnauditedProFormaFinancialInformationDetails" xlink:href="evrg-20181231.xsd#MergerOfGreatPlainsEnergyAndWestarEnergyUnauditedProFormaFinancialInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/PensionPlansAndOtherEmployeeBenefits" xlink:href="evrg-20181231.xsd#PensionPlansAndOtherEmployeeBenefits" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/PensionPlansAndOtherEmployeeBenefitsPensionPlansAndPostRetirementBenefitsDetails" xlink:href="evrg-20181231.xsd#PensionPlansAndOtherEmployeeBenefitsPensionPlansAndPostRetirementBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/PensionPlansAndOtherEmployeeBenefitsPensionPlansFairValueDetails" xlink:href="evrg-20181231.xsd#PensionPlansAndOtherEmployeeBenefitsPensionPlansFairValueDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/PensionPlansAndOtherEmployeeBenefitsTables" xlink:href="evrg-20181231.xsd#PensionPlansAndOtherEmployeeBenefitsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/PropertyPlantEquipmentPropertyPlantAndEquipmentDetails" xlink:href="evrg-20181231.xsd#PropertyPlantEquipmentPropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/PropertyPlantEquipmentPropertyPlantAndEquipmentTables" xlink:href="evrg-20181231.xsd#PropertyPlantEquipmentPropertyPlantAndEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/PropertyPlantEquipmentPropertyPlantEquipment" xlink:href="evrg-20181231.xsd#PropertyPlantEquipmentPropertyPlantEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/QuarterlyOperatingResultsUnaudited" xlink:href="evrg-20181231.xsd#QuarterlyOperatingResultsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/QuarterlyOperatingResultsUnauditedDetails" xlink:href="evrg-20181231.xsd#QuarterlyOperatingResultsUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/QuarterlyOperatingResultsUnauditedTables" xlink:href="evrg-20181231.xsd#QuarterlyOperatingResultsUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RateMattersAndRegulation" xlink:href="evrg-20181231.xsd#RateMattersAndRegulation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RateMattersAndRegulationDetails" xlink:href="evrg-20181231.xsd#RateMattersAndRegulationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RateMattersAndRegulationRateMattersAndRegulationTables" xlink:href="evrg-20181231.xsd#RateMattersAndRegulationRateMattersAndRegulationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RateMattersAndRegulationRegulatoryMattersSubsequentEventsDetails" xlink:href="evrg-20181231.xsd#RateMattersAndRegulationRegulatoryMattersSubsequentEventsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/Receivables" xlink:href="evrg-20181231.xsd#Receivables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ReceivablesDetails" xlink:href="evrg-20181231.xsd#ReceivablesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ReceivablesNarrativeDetails" xlink:href="evrg-20181231.xsd#ReceivablesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ReceivablesSummaryOfBadDebtExpenseDetails" xlink:href="evrg-20181231.xsd#ReceivablesSummaryOfBadDebtExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ReceivablesTables" xlink:href="evrg-20181231.xsd#ReceivablesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RegulatoryMattersAssetDetails" xlink:href="evrg-20181231.xsd#RegulatoryMattersAssetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RegulatoryMattersLiabilitiesDetails" xlink:href="evrg-20181231.xsd#RegulatoryMattersLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RelatedPartyTransactionsAndRelationships" xlink:href="evrg-20181231.xsd#RelatedPartyTransactionsAndRelationships" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RelatedPartyTransactionsAndRelationshipsDetails" xlink:href="evrg-20181231.xsd#RelatedPartyTransactionsAndRelationshipsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RelatedPartyTransactionsAndRelationshipsTables" xlink:href="evrg-20181231.xsd#RelatedPartyTransactionsAndRelationshipsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/Revenue" xlink:href="evrg-20181231.xsd#Revenue" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RevenueDetails" xlink:href="evrg-20181231.xsd#RevenueDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/RevenueTables" xlink:href="evrg-20181231.xsd#RevenueTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompany" xlink:href="evrg-20181231.xsd#ScheduleIFinancialStatementsOfParentCompany" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompanyBalanceSheetDetails" xlink:href="evrg-20181231.xsd#ScheduleIFinancialStatementsOfParentCompanyBalanceSheetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompanyBalanceSheetParentheticalDetails" xlink:href="evrg-20181231.xsd#ScheduleIFinancialStatementsOfParentCompanyBalanceSheetParentheticalDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompanyStatementOfCashFlowsDetails" xlink:href="evrg-20181231.xsd#ScheduleIFinancialStatementsOfParentCompanyStatementOfCashFlowsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompanyStatementsOfIncomeOciDetails" xlink:href="evrg-20181231.xsd#ScheduleIFinancialStatementsOfParentCompanyStatementsOfIncomeOciDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ScheduleIiValuationAndQualifyingAccounts" xlink:href="evrg-20181231.xsd#ScheduleIiValuationAndQualifyingAccounts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ScheduleIiValuationAndQualifyingAccountsDetails" xlink:href="evrg-20181231.xsd#ScheduleIiValuationAndQualifyingAccountsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ShareholdersEquity" xlink:href="evrg-20181231.xsd#ShareholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ShareholdersEquityDetails" xlink:href="evrg-20181231.xsd#ShareholdersEquityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ShortTermBorrowingsAndShortTermBankLinesOfCredit" xlink:href="evrg-20181231.xsd#ShortTermBorrowingsAndShortTermBankLinesOfCredit" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ShortTermBorrowingsAndShortTermBankLinesOfCreditDetails" xlink:href="evrg-20181231.xsd#ShortTermBorrowingsAndShortTermBankLinesOfCreditDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/ShortTermBorrowingsAndShortTermBankLinesOfCreditTables" xlink:href="evrg-20181231.xsd#ShortTermBorrowingsAndShortTermBankLinesOfCreditTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesAllowanceForFundsUsedDuringConstructionDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesAllowanceForFundsUsedDuringConstructionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesCorporateOwnedLifeInsuranceDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesCorporateOwnedLifeInsuranceDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesEarningsPerShareDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesEarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesFuelInventoryAndSuppliesDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesFuelInventoryAndSuppliesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesNewAccountingStandardsDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesNewAccountingStandardsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesOrganizationDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesOrganizationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesOtherIncomeExpenseDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesOtherIncomeExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfRetrospectiveAdjustmentsDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesScheduleOfRetrospectiveAdjustmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfReclassificationsDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesSummaryOfReclassificationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPolicies" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSupplementalCashFlowInformationDetails" xlink:href="evrg-20181231.xsd#SummaryOfSignificantAccountingPoliciesSupplementalCashFlowInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/Taxes" xlink:href="evrg-20181231.xsd#Taxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/TaxesDeferredIncomeTaxesDetails" xlink:href="evrg-20181231.xsd#TaxesDeferredIncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/TaxesNetOperatingLossCarryforwardsDetails" xlink:href="evrg-20181231.xsd#TaxesNetOperatingLossCarryforwardsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/TaxesTables" xlink:href="evrg-20181231.xsd#TaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/TaxesTaxCreditCarryforwardsDetails" xlink:href="evrg-20181231.xsd#TaxesTaxCreditCarryforwardsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/TaxesTaxReformDetails" xlink:href="evrg-20181231.xsd#TaxesTaxReformDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/TaxesValuationAllowanceDetails" xlink:href="evrg-20181231.xsd#TaxesValuationAllowanceDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/VariableInterestEntities" xlink:href="evrg-20181231.xsd#VariableInterestEntities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/VariableInterestEntitiesDetails" xlink:href="evrg-20181231.xsd#VariableInterestEntitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.greatplainsenergy.com/role/VariableInterestEntitiesTables" xlink:href="evrg-20181231.xsd#VariableInterestEntitiesTables" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/AssetRetirementObligations" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/AssetRetirementObligationsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_A96DB2EF7AE7C0C03F79EC8D4F5F0FA3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_6493B5602080E0E2D638EC8D4F5DEC6F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_A96DB2EF7AE7C0C03F79EC8D4F5F0FA3" xlink:to="loc_us-gaap_StatementTable_6493B5602080E0E2D638EC8D4F5DEC6F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_C0B1A27520B7C559962DEC8D4F5D998D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6493B5602080E0E2D638EC8D4F5DEC6F" xlink:to="loc_dei_LegalEntityAxis_C0B1A27520B7C559962DEC8D4F5D998D" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_9BBFD20AE7744A0F74ADEC8D4F5E0D8F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_C0B1A27520B7C559962DEC8D4F5D998D" xlink:to="loc_dei_EntityDomain_9BBFD20AE7744A0F74ADEC8D4F5E0D8F_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_9BBFD20AE7744A0F74ADEC8D4F5E0D8F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_C0B1A27520B7C559962DEC8D4F5D998D" xlink:to="loc_dei_EntityDomain_9BBFD20AE7744A0F74ADEC8D4F5E0D8F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_E57C7E64727C325D0DA8EC8D4F5EBBE2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9BBFD20AE7744A0F74ADEC8D4F5E0D8F" xlink:to="loc_evrg_WestarEnergyIncMember_E57C7E64727C325D0DA8EC8D4F5EBBE2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_A56F38A89B098C54C2CAEC8D4F5E32A5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9BBFD20AE7744A0F74ADEC8D4F5E0D8F" xlink:to="loc_evrg_KCPLMember_A56F38A89B098C54C2CAEC8D4F5E32A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantAxis" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantAxis_D43DEF02994C788400EEEC8D4F5EBC58" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6493B5602080E0E2D638EC8D4F5DEC6F" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantAxis_D43DEF02994C788400EEEC8D4F5EBC58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_20830DE90A2508E8B8FEEC8D4F5F68EA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_D43DEF02994C788400EEEC8D4F5EBC58" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_20830DE90A2508E8B8FEEC8D4F5F68EA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_20830DE90A2508E8B8FEEC8D4F5F68EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_D43DEF02994C788400EEEC8D4F5EBC58" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_20830DE90A2508E8B8FEEC8D4F5F68EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedNuclearPowerPlantMember" xlink:label="loc_us-gaap_JointlyOwnedNuclearPowerPlantMember_2AEF54CC94CA938E524DEC8D4F5FDE0C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_20830DE90A2508E8B8FEEC8D4F5F68EA" xlink:to="loc_us-gaap_JointlyOwnedNuclearPowerPlantMember_2AEF54CC94CA938E524DEC8D4F5FDE0C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_27D8B0519C288039E081EC8D4F5FFC82" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A96DB2EF7AE7C0C03F79EC8D4F5F0FA3" xlink:to="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_27D8B0519C288039E081EC8D4F5FFC82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligation" xlink:label="loc_us-gaap_AssetRetirementObligation_6DF807797429D3971BC3EC8D4F607E8D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_27D8B0519C288039E081EC8D4F5FFC82" xlink:to="loc_us-gaap_AssetRetirementObligation_6DF807797429D3971BC3EC8D4F607E8D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AssetRetirementObligationLiabilitiesAssumed" xlink:label="loc_evrg_AssetRetirementObligationLiabilitiesAssumed_CEE1F7287BBEC84F9042EC8D4F602B1A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_27D8B0519C288039E081EC8D4F5FFC82" xlink:to="loc_evrg_AssetRetirementObligationLiabilitiesAssumed_CEE1F7287BBEC84F9042EC8D4F602B1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationLiabilitiesIncurred" xlink:label="loc_us-gaap_AssetRetirementObligationLiabilitiesIncurred_B7BF0599DC6CAABEF6FAEC8D4F600576" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_27D8B0519C288039E081EC8D4F5FFC82" xlink:to="loc_us-gaap_AssetRetirementObligationLiabilitiesIncurred_B7BF0599DC6CAABEF6FAEC8D4F600576" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:label="loc_us-gaap_AssetRetirementObligationRevisionOfEstimate_C53DFEDABC8313588697EC8D4F6080B4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_27D8B0519C288039E081EC8D4F5FFC82" xlink:to="loc_us-gaap_AssetRetirementObligationRevisionOfEstimate_C53DFEDABC8313588697EC8D4F6080B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationLiabilitiesSettled" xlink:label="loc_us-gaap_AssetRetirementObligationLiabilitiesSettled_5D57F46806002D0F491CEC8D4F60F51A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_27D8B0519C288039E081EC8D4F5FFC82" xlink:to="loc_us-gaap_AssetRetirementObligationLiabilitiesSettled_5D57F46806002D0F491CEC8D4F60F51A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationAccretionExpense" xlink:label="loc_us-gaap_AssetRetirementObligationAccretionExpense_2F39B8E01E1746E889C5EC8D4F611929" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_27D8B0519C288039E081EC8D4F5FFC82" xlink:to="loc_us-gaap_AssetRetirementObligationAccretionExpense_2F39B8E01E1746E889C5EC8D4F611929" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationCurrent" xlink:label="loc_us-gaap_AssetRetirementObligationCurrent_8DE65F2FAF2750599B34EC8D4F613BB9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A96DB2EF7AE7C0C03F79EC8D4F5F0FA3" xlink:to="loc_us-gaap_AssetRetirementObligationCurrent_8DE65F2FAF2750599B34EC8D4F613BB9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_82ADA1E9D4BB78CEAA70EC8D4F6152CC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A96DB2EF7AE7C0C03F79EC8D4F5F0FA3" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_82ADA1E9D4BB78CEAA70EC8D4F6152CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_FAD06EC3ECE458EE7F3BEC8D4F615163" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A96DB2EF7AE7C0C03F79EC8D4F5F0FA3" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_FAD06EC3ECE458EE7F3BEC8D4F615163" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/AssetRetirementObligationsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesCapitalLeasesAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasedAssetsLineItems" xlink:label="loc_us-gaap_CapitalLeasedAssetsLineItems_FCAEBBFFC1C3EC669817077EE5A9950B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfCapitalLeasedAsssetsTable" xlink:label="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_B0AB23D862B0C162262A077EE5A5C6B1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_FCAEBBFFC1C3EC669817077EE5A9950B" xlink:to="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_B0AB23D862B0C162262A077EE5A5C6B1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_2393304D4159D0968B4B077EE5A64EB6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_B0AB23D862B0C162262A077EE5A5C6B1" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_2393304D4159D0968B4B077EE5A64EB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_269F145A17CD2B6F27B3077EE5A60A5A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_2393304D4159D0968B4B077EE5A64EB6" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_269F145A17CD2B6F27B3077EE5A60A5A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_269F145A17CD2B6F27B3077EE5A60A5A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_2393304D4159D0968B4B077EE5A64EB6" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_269F145A17CD2B6F27B3077EE5A60A5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesInventoryFuelMember" xlink:label="loc_us-gaap_PublicUtilitiesInventoryFuelMember_694711092FBCB1CB44F4077EE5A6675D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_269F145A17CD2B6F27B3077EE5A60A5A" xlink:to="loc_us-gaap_PublicUtilitiesInventoryFuelMember_694711092FBCB1CB44F4077EE5A6675D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherPurchaseCommitmentsMember" xlink:label="loc_evrg_OtherPurchaseCommitmentsMember_27EB5829743A9D3C27AE077EE5A683F9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_269F145A17CD2B6F27B3077EE5A60A5A" xlink:to="loc_evrg_OtherPurchaseCommitmentsMember_27EB5829743A9D3C27AE077EE5A683F9" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_3027D024119CB03DC152077EE5A73B36" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_B0AB23D862B0C162262A077EE5A5C6B1" xlink:to="loc_dei_LegalEntityAxis_3027D024119CB03DC152077EE5A73B36" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F53620D08573D0B1720C077EE5A7087B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3027D024119CB03DC152077EE5A73B36" xlink:to="loc_dei_EntityDomain_F53620D08573D0B1720C077EE5A7087B_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F53620D08573D0B1720C077EE5A7087B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3027D024119CB03DC152077EE5A73B36" xlink:to="loc_dei_EntityDomain_F53620D08573D0B1720C077EE5A7087B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_21C2E37B4DD88C72A1EC077EE5A7036D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F53620D08573D0B1720C077EE5A7087B" xlink:to="loc_evrg_WestarEnergyIncMember_21C2E37B4DD88C72A1EC077EE5A7036D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_52C3CBB5F19E6AEFDFE8077EE5A7DA60" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F53620D08573D0B1720C077EE5A7087B" xlink:to="loc_evrg_KCPLMember_52C3CBB5F19E6AEFDFE8077EE5A7DA60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MajorPropertyClassAxis" xlink:label="loc_us-gaap_MajorPropertyClassAxis_5B375C94CA2EF21ED36B077EE5A83138" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_B0AB23D862B0C162262A077EE5A5C6B1" xlink:to="loc_us-gaap_MajorPropertyClassAxis_5B375C94CA2EF21ED36B077EE5A83138" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MajorPropertyClassDomain" xlink:label="loc_us-gaap_MajorPropertyClassDomain_3E761F9E5E0A03D331B7077EE5A887FD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MajorPropertyClassAxis_5B375C94CA2EF21ED36B077EE5A83138" xlink:to="loc_us-gaap_MajorPropertyClassDomain_3E761F9E5E0A03D331B7077EE5A887FD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MajorPropertyClassDomain" xlink:label="loc_us-gaap_MajorPropertyClassDomain_3E761F9E5E0A03D331B7077EE5A887FD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MajorPropertyClassAxis_5B375C94CA2EF21ED36B077EE5A83138" xlink:to="loc_us-gaap_MajorPropertyClassDomain_3E761F9E5E0A03D331B7077EE5A887FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VehiclesMember" xlink:label="loc_us-gaap_VehiclesMember_CD861AEB7557A2CF63E3077EE5A8BE97" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorPropertyClassDomain_3E761F9E5E0A03D331B7077EE5A887FD" xlink:to="loc_us-gaap_VehiclesMember_CD861AEB7557A2CF63E3077EE5A8BE97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComputerEquipmentMember" xlink:label="loc_us-gaap_ComputerEquipmentMember_21092D797D5DB7DEFAEA077EE5A85B94" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorPropertyClassDomain_3E761F9E5E0A03D331B7077EE5A887FD" xlink:to="loc_us-gaap_ComputerEquipmentMember_21092D797D5DB7DEFAEA077EE5A85B94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ElectricGenerationEquipmentMember" xlink:label="loc_us-gaap_ElectricGenerationEquipmentMember_9654E848971A84D9E509077EE5A8CB0C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorPropertyClassDomain_3E761F9E5E0A03D331B7077EE5A887FD" xlink:to="loc_us-gaap_ElectricGenerationEquipmentMember_9654E848971A84D9E509077EE5A8CB0C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherMachineryAndEquipmentMember" xlink:label="loc_us-gaap_OtherMachineryAndEquipmentMember_9DB50B423396AEA6CB4C077EE5A87612" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorPropertyClassDomain_3E761F9E5E0A03D331B7077EE5A887FD" xlink:to="loc_us-gaap_OtherMachineryAndEquipmentMember_9DB50B423396AEA6CB4C077EE5A87612" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_5B9AF118A27E2A11C125077EE5A94B7D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_B0AB23D862B0C162262A077EE5A5C6B1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_5B9AF118A27E2A11C125077EE5A94B7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98D0EA4287BECE090515077EE5A920DE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_5B9AF118A27E2A11C125077EE5A94B7D" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98D0EA4287BECE090515077EE5A920DE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98D0EA4287BECE090515077EE5A920DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_5B9AF118A27E2A11C125077EE5A94B7D" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98D0EA4287BECE090515077EE5A920DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasedAssetsGross" xlink:label="loc_us-gaap_CapitalLeasedAssetsGross_A9ADB79D659448D27F9B078CC6CE67A0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_FCAEBBFFC1C3EC669817077EE5A9950B" xlink:to="loc_us-gaap_CapitalLeasedAssetsGross_A9ADB79D659448D27F9B078CC6CE67A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet" xlink:label="loc_us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet_D7DF5EBBBE694649C01F077EE5A94D32" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_FCAEBBFFC1C3EC669817077EE5A9950B" xlink:to="loc_us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet_D7DF5EBBBE694649C01F077EE5A94D32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation" xlink:label="loc_us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation_B4AC1F1E03743D17265E077EE5AA7883" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_FCAEBBFFC1C3EC669817077EE5A9950B" xlink:to="loc_us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation_B4AC1F1E03743D17265E077EE5AA7883" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesCapitalLeasesMinimumAnnualRentalPaymentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasedAssetsLineItems" xlink:label="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfCapitalLeasedAsssetsTable" xlink:label="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_920B42183166962E2484077EE59B5D95" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_920B42183166962E2484077EE59B5D95" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MajorPropertyClassAxis" xlink:label="loc_us-gaap_MajorPropertyClassAxis_9BDD6D8CEE1C9207C39C077EE59BC448" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_920B42183166962E2484077EE59B5D95" xlink:to="loc_us-gaap_MajorPropertyClassAxis_9BDD6D8CEE1C9207C39C077EE59BC448" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MajorPropertyClassDomain" xlink:label="loc_us-gaap_MajorPropertyClassDomain_CEF87390F951A8B4FC47077EE59BEA99_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MajorPropertyClassAxis_9BDD6D8CEE1C9207C39C077EE59BC448" xlink:to="loc_us-gaap_MajorPropertyClassDomain_CEF87390F951A8B4FC47077EE59BEA99_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MajorPropertyClassDomain" xlink:label="loc_us-gaap_MajorPropertyClassDomain_CEF87390F951A8B4FC47077EE59BEA99" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MajorPropertyClassAxis_9BDD6D8CEE1C9207C39C077EE59BC448" xlink:to="loc_us-gaap_MajorPropertyClassDomain_CEF87390F951A8B4FC47077EE59BEA99" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VehiclesMember" xlink:label="loc_us-gaap_VehiclesMember_DF3059D31366D9B353AD077EE59CC31B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorPropertyClassDomain_CEF87390F951A8B4FC47077EE59BEA99" xlink:to="loc_us-gaap_VehiclesMember_DF3059D31366D9B353AD077EE59CC31B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComputerEquipmentMember" xlink:label="loc_us-gaap_ComputerEquipmentMember_4764BDFE2055744E2541077EE59C00C9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorPropertyClassDomain_CEF87390F951A8B4FC47077EE59BEA99" xlink:to="loc_us-gaap_ComputerEquipmentMember_4764BDFE2055744E2541077EE59C00C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ElectricGenerationEquipmentMember" xlink:label="loc_us-gaap_ElectricGenerationEquipmentMember_7149AC6CACD6AFFE3D80077EE59C5F0B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorPropertyClassDomain_CEF87390F951A8B4FC47077EE59BEA99" xlink:to="loc_us-gaap_ElectricGenerationEquipmentMember_7149AC6CACD6AFFE3D80077EE59C5F0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherMachineryAndEquipmentMember" xlink:label="loc_us-gaap_OtherMachineryAndEquipmentMember_6ED2EC7D82981CF3C8B0077EE59C4541" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MajorPropertyClassDomain_CEF87390F951A8B4FC47077EE59BEA99" xlink:to="loc_us-gaap_OtherMachineryAndEquipmentMember_6ED2EC7D82981CF3C8B0077EE59C4541" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_848CAC30B544F5374308077EE59DF986" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCapitalLeasedAsssetsTable_920B42183166962E2484077EE59B5D95" xlink:to="loc_dei_LegalEntityAxis_848CAC30B544F5374308077EE59DF986" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_A46D1CF8D4B792303997077EE59DAA6B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_848CAC30B544F5374308077EE59DF986" xlink:to="loc_dei_EntityDomain_A46D1CF8D4B792303997077EE59DAA6B_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_A46D1CF8D4B792303997077EE59DAA6B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_848CAC30B544F5374308077EE59DF986" xlink:to="loc_dei_EntityDomain_A46D1CF8D4B792303997077EE59DAA6B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_A9DDE3A825CD439AC3D1077EE59D7B6F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_A46D1CF8D4B792303997077EE59DAA6B" xlink:to="loc_evrg_WestarEnergyIncMember_A9DDE3A825CD439AC3D1077EE59D7B6F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_040BFEE5F23EDEBE1088077EE59DC0BF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_A46D1CF8D4B792303997077EE59DAA6B" xlink:to="loc_evrg_KCPLMember_040BFEE5F23EDEBE1088077EE59DC0BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_EE94727FB316203FAB6B077EE59ECC51" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_EE94727FB316203FAB6B077EE59ECC51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_39E85A1218A86F45C070077EE59E9A8E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_39E85A1218A86F45C070077EE59E9A8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_6A3F036CC967DE17BEC3077EE59EDD63" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_6A3F036CC967DE17BEC3077EE59EDD63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_C6F56ECFFA92D94EE807077EE59E9F92" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_C6F56ECFFA92D94EE807077EE59E9F92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_23C624DFD8F8E5E258DA077EE59E99DC" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_23C624DFD8F8E5E258DA077EE59E99DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_FE7C59B466A5ED771630077EE59F6B97" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_FE7C59B466A5ED771630077EE59F6B97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_9DA0DF252365D48FFCCA077EE59F72E7" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_9DA0DF252365D48FFCCA077EE59F72E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_8F5349C755037BCFB4DB077EE59FEEE4" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_8F5349C755037BCFB4DB077EE59FEEE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_2FCCAB6A9A744B493C2C077EE59F48B8" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_2FCCAB6A9A744B493C2C077EE59F48B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeaseObligationsCurrent" xlink:label="loc_us-gaap_CapitalLeaseObligationsCurrent_C9022C340FE33D2E1561077EE59F2ABE" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeaseObligationsCurrent_C9022C340FE33D2E1561077EE59F2ABE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent" xlink:label="loc_us-gaap_CapitalLeaseObligationsNoncurrent_D4F8C1C1661B805C26AC077EE59F81C4" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalLeasedAssetsLineItems_5E446FBC74398E65D412077EE59DA1A0" xlink:to="loc_us-gaap_CapitalLeaseObligationsNoncurrent_D4F8C1C1661B805C26AC077EE59F81C4" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesContractualCommitmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_9188E436AEEC7B104DDE077DEF070E42" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationTable" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5D558AE1C5BF57E46A36077DEF020067" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_9188E436AEEC7B104DDE077DEF070E42" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5D558AE1C5BF57E46A36077DEF020067" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_8021BC8D37ED047D8AF9077DEF03D81E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5D558AE1C5BF57E46A36077DEF020067" xlink:to="loc_dei_LegalEntityAxis_8021BC8D37ED047D8AF9077DEF03D81E" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8E15C9D38471E8D65FFC077DEF041519_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8021BC8D37ED047D8AF9077DEF03D81E" xlink:to="loc_dei_EntityDomain_8E15C9D38471E8D65FFC077DEF041519_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8E15C9D38471E8D65FFC077DEF041519" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8021BC8D37ED047D8AF9077DEF03D81E" xlink:to="loc_dei_EntityDomain_8E15C9D38471E8D65FFC077DEF041519" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_93F202AC60469EDEB606077DEF041AAD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8E15C9D38471E8D65FFC077DEF041519" xlink:to="loc_evrg_WestarEnergyIncMember_93F202AC60469EDEB606077DEF041AAD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_D417025649A340E63299077DEF0551E2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8E15C9D38471E8D65FFC077DEF041519" xlink:to="loc_evrg_KCPLMember_D417025649A340E63299077DEF0551E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_7758FB2BB03BCBA5AADD077DEF05E8F8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5D558AE1C5BF57E46A36077DEF020067" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_7758FB2BB03BCBA5AADD077DEF05E8F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_AD3E3737CFDEA979F395077DEF054424_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_7758FB2BB03BCBA5AADD077DEF05E8F8" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_AD3E3737CFDEA979F395077DEF054424_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_AD3E3737CFDEA979F395077DEF054424" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_7758FB2BB03BCBA5AADD077DEF05E8F8" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_AD3E3737CFDEA979F395077DEF054424" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesInventoryFuelMember" xlink:label="loc_us-gaap_PublicUtilitiesInventoryFuelMember_BF67CAFAC91F31E98C68077DEF06CD6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_AD3E3737CFDEA979F395077DEF054424" xlink:to="loc_us-gaap_PublicUtilitiesInventoryFuelMember_BF67CAFAC91F31E98C68077DEF06CD6E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PurchasedPowerMember" xlink:label="loc_evrg_PurchasedPowerMember_B99EDE80723EE7FA6749077DEF06E48D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_AD3E3737CFDEA979F395077DEF054424" xlink:to="loc_evrg_PurchasedPowerMember_B99EDE80723EE7FA6749077DEF06E48D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherPurchaseCommitmentsMember" xlink:label="loc_evrg_OtherPurchaseCommitmentsMember_256052B0129832DEF79D077DEF073287" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_AD3E3737CFDEA979F395077DEF054424" xlink:to="loc_evrg_OtherPurchaseCommitmentsMember_256052B0129832DEF79D077DEF073287" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_9188E436AEEC7B104DDE077DEF070E42" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_4BD6D8611B4DFFB675DA077DEF0D4D53" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_4BD6D8611B4DFFB675DA077DEF0D4D53" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_2B5ABBA94BF1B811DB1A077DEF0D1AD0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_2B5ABBA94BF1B811DB1A077DEF0D1AD0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_28407B66FBF3BA77C20A077DEF0E6B84" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_28407B66FBF3BA77C20A077DEF0E6B84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_C5306668C3FB124B07BB077DEF0ED9F6" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_C5306668C3FB124B07BB077DEF0ED9F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_AB92F39C2B00BC268B5207822183D200" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_AB92F39C2B00BC268B5207822183D200" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_2EA9BA6DD941EEDEC6F407822198ABBB" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_2EA9BA6DD941EEDEC6F407822198ABBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_CC7BFB42E0D95460D6CE078221AC6BA2" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_A9AFBB913BD73267FA13077DEF0CFC46" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_CC7BFB42E0D95460D6CE078221AC6BA2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesEnvironmentalMattersDetails" xlink:type="extended">
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesLineItems" xlink:label="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesLineItems_4CC5D0D1CDF61A0AFA40077EE5BEF7F1" xlink:type="locator" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesTable" xlink:label="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesTable_6542340712B97DEC39D2077EE5B9C160" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesLineItems_4CC5D0D1CDF61A0AFA40077EE5BEF7F1" xlink:to="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesTable_6542340712B97DEC39D2077EE5B9C160" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplyCommitmentAxis" xlink:label="loc_us-gaap_SupplyCommitmentAxis_8444DDCA178C27243BB2077EE5B96BC3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesTable_6542340712B97DEC39D2077EE5B9C160" xlink:to="loc_us-gaap_SupplyCommitmentAxis_8444DDCA178C27243BB2077EE5B96BC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplyCommitmentArrangementMember" xlink:label="loc_us-gaap_SupplyCommitmentArrangementMember_7587FF8552453DDED7C3077EE5B96318_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SupplyCommitmentAxis_8444DDCA178C27243BB2077EE5B96BC3" xlink:to="loc_us-gaap_SupplyCommitmentArrangementMember_7587FF8552453DDED7C3077EE5B96318_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplyCommitmentArrangementMember" xlink:label="loc_us-gaap_SupplyCommitmentArrangementMember_7587FF8552453DDED7C3077EE5B96318" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SupplyCommitmentAxis_8444DDCA178C27243BB2077EE5B96BC3" xlink:to="loc_us-gaap_SupplyCommitmentArrangementMember_7587FF8552453DDED7C3077EE5B96318" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplyCommitmentMember" xlink:label="loc_us-gaap_SupplyCommitmentMember_D9EFCC11357F5746A862077EE5B9C286" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplyCommitmentArrangementMember_7587FF8552453DDED7C3077EE5B96318" xlink:to="loc_us-gaap_SupplyCommitmentMember_D9EFCC11357F5746A862077EE5B9C286" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_8ACF59E8F7EB0253491E077EE5BABC1D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesTable_6542340712B97DEC39D2077EE5B9C160" xlink:to="loc_dei_LegalEntityAxis_8ACF59E8F7EB0253491E077EE5BABC1D" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_B70DEE11B6DB4872ED3E077EE5BA0A0E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8ACF59E8F7EB0253491E077EE5BABC1D" xlink:to="loc_dei_EntityDomain_B70DEE11B6DB4872ED3E077EE5BA0A0E_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_B70DEE11B6DB4872ED3E077EE5BA0A0E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8ACF59E8F7EB0253491E077EE5BABC1D" xlink:to="loc_dei_EntityDomain_B70DEE11B6DB4872ED3E077EE5BA0A0E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EvergyMember" xlink:label="loc_evrg_EvergyMember_34A4368650CF8AA38AC9077EE5BA8EC9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_B70DEE11B6DB4872ED3E077EE5BA0A0E" xlink:to="loc_evrg_EvergyMember_34A4368650CF8AA38AC9077EE5BA8EC9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_BA1D31B5543FF3E47793077EE5BAA201" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_B70DEE11B6DB4872ED3E077EE5BA0A0E" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_BA1D31B5543FF3E47793077EE5BAA201" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_3276E7A2D21914442B10077EE5BBEC16" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_B70DEE11B6DB4872ED3E077EE5BA0A0E" xlink:to="loc_evrg_WestarEnergyIncMember_3276E7A2D21914442B10077EE5BBEC16" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_9B5FCA49A088B4E3ED18077EE5BBF32D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_B70DEE11B6DB4872ED3E077EE5BA0A0E" xlink:to="loc_evrg_KCPLMember_9B5FCA49A088B4E3ED18077EE5BBF32D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_7C2487CBA1DF21D7FD59077EE5BB63D4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesTable_6542340712B97DEC39D2077EE5B9C160" xlink:to="loc_srt_ConsolidatedEntitiesAxis_7C2487CBA1DF21D7FD59077EE5BB63D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_3452079FC025ABB83939077EE5BB4D06_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_7C2487CBA1DF21D7FD59077EE5BB63D4" xlink:to="loc_srt_ConsolidatedEntitiesDomain_3452079FC025ABB83939077EE5BB4D06_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_3452079FC025ABB83939077EE5BB4D06" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_7C2487CBA1DF21D7FD59077EE5BB63D4" xlink:to="loc_srt_ConsolidatedEntitiesDomain_3452079FC025ABB83939077EE5BB4D06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantAxis" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantAxis_C4EB612F1C3B974458F3077EE5BB5AFC" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesTable_6542340712B97DEC39D2077EE5B9C160" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantAxis_C4EB612F1C3B974458F3077EE5BB5AFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_35E6CD02D13616F4325F077EE5BC8257_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_C4EB612F1C3B974458F3077EE5BB5AFC" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_35E6CD02D13616F4325F077EE5BC8257_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_35E6CD02D13616F4325F077EE5BC8257" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_C4EB612F1C3B974458F3077EE5BB5AFC" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_35E6CD02D13616F4325F077EE5BC8257" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationsPlantJeffreyUnitsNos1and2Member" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationsPlantJeffreyUnitsNos1and2Member_4CC613D1B58825CA13A7077EE5BCB2ED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_35E6CD02D13616F4325F077EE5BC8257" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationsPlantJeffreyUnitsNos1and2Member_4CC613D1B58825CA13A7077EE5BCB2ED" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantLaCygneStationMember" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantLaCygneStationMember_4864E8632F1B7D552E5E077EE5BCC498" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_35E6CD02D13616F4325F077EE5BC8257" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantLaCygneStationMember_4864E8632F1B7D552E5E077EE5BCC498" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantIatanNo1Member" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanNo1Member_8E2C0A89A6E7FAAB2165077EE5BC348D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_35E6CD02D13616F4325F077EE5BC8257" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanNo1Member_8E2C0A89A6E7FAAB2165077EE5BC348D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_D1E1A5EF04B7EDBFC200077EE5BCDD83" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesTable_6542340712B97DEC39D2077EE5B9C160" xlink:to="loc_srt_StatementGeographicalAxis_D1E1A5EF04B7EDBFC200077EE5BCDD83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_639992A7DC5E1C079CF7077EE5BD9482_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_D1E1A5EF04B7EDBFC200077EE5BCDD83" xlink:to="loc_srt_SegmentGeographicalDomain_639992A7DC5E1C079CF7077EE5BD9482_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_639992A7DC5E1C079CF7077EE5BD9482" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_D1E1A5EF04B7EDBFC200077EE5BCDD83" xlink:to="loc_srt_SegmentGeographicalDomain_639992A7DC5E1C079CF7077EE5BD9482" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_MO" xlink:label="loc_stpr_MO_1261D25C42E6B545B215077EE5BDFABC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_639992A7DC5E1C079CF7077EE5BD9482" xlink:to="loc_stpr_MO_1261D25C42E6B545B215077EE5BDFABC" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_KS" xlink:label="loc_stpr_KS_6E1CC319256564B472CA077EE5BED55E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_639992A7DC5E1C079CF7077EE5BD9482" xlink:to="loc_stpr_KS_6E1CC319256564B472CA077EE5BED55E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearInsuranceAbstract" xlink:label="loc_evrg_NuclearInsuranceAbstract_277D39227C9547CF9638077EE5BE1618" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesLineItems_4CC5D0D1CDF61A0AFA40077EE5BEF7F1" xlink:to="loc_evrg_NuclearInsuranceAbstract_277D39227C9547CF9638077EE5BE1618" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_Industry_Aggregate_Limit_For_Nuclear_Insurance" xlink:label="loc_evrg_Industry_Aggregate_Limit_For_Nuclear_Insurance_F556251F4C7CEEE281A9077EE5BEFDA2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearInsuranceAbstract_277D39227C9547CF9638077EE5BE1618" xlink:to="loc_evrg_Industry_Aggregate_Limit_For_Nuclear_Insurance_F556251F4C7CEEE281A9077EE5BEFDA2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IndustryAggregateLimitForNonNuclearInsurance" xlink:label="loc_evrg_IndustryAggregateLimitForNonNuclearInsurance_E387A319CDBFD194FCEC077EE5BE4C7B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearInsuranceAbstract_277D39227C9547CF9638077EE5BE1618" xlink:to="loc_evrg_IndustryAggregateLimitForNonNuclearInsurance_E387A319CDBFD194FCEC077EE5BE4C7B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceAbstract" xlink:label="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_EstimatesOfEnvironmentalFinancialImpactAndRelatedIssuesLineItems_4CC5D0D1CDF61A0AFA40077EE5BEF7F1" xlink:to="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceFullLimitOfPublicLiability" xlink:label="loc_evrg_NuclearLiabilityInsuranceFullLimitOfPublicLiability_9B51F98DA3C634F8F43A077EE5BF731E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:to="loc_evrg_NuclearLiabilityInsuranceFullLimitOfPublicLiability_9B51F98DA3C634F8F43A077EE5BF731E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceMaximumAvailableCommercialInsurance" xlink:label="loc_evrg_NuclearLiabilityInsuranceMaximumAvailableCommercialInsurance_AFE23EE6AD6C719027D7077EE5BFBBE9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:to="loc_evrg_NuclearLiabilityInsuranceMaximumAvailableCommercialInsurance_AFE23EE6AD6C719027D7077EE5BFBBE9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceIndustryWideRetrospectiveAssessmentProgram" xlink:label="loc_evrg_NuclearLiabilityInsuranceIndustryWideRetrospectiveAssessmentProgram_6F507C965C57E2409447077EE5BF6BD5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:to="loc_evrg_NuclearLiabilityInsuranceIndustryWideRetrospectiveAssessmentProgram_6F507C965C57E2409447077EE5BF6BD5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceOwnersInsuranceAmountMaximum" xlink:label="loc_evrg_NuclearLiabilityInsuranceOwnersInsuranceAmountMaximum_957BD4F7DC55F7C287CA077EE5BF2717" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:to="loc_evrg_NuclearLiabilityInsuranceOwnersInsuranceAmountMaximum_957BD4F7DC55F7C287CA077EE5BF2717" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceOwnersInsuranceAmountPerIncident" xlink:label="loc_evrg_NuclearLiabilityInsuranceOwnersInsuranceAmountPerIncident_36A2D84C60A1310C750D077EE5C07F53" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:to="loc_evrg_NuclearLiabilityInsuranceOwnersInsuranceAmountPerIncident_36A2D84C60A1310C750D077EE5C07F53" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceOwnersPropertyInsuranceMaximum" xlink:label="loc_evrg_NuclearLiabilityInsuranceOwnersPropertyInsuranceMaximum_750EDC38808469B9846B077EE5C0C942" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:to="loc_evrg_NuclearLiabilityInsuranceOwnersPropertyInsuranceMaximum_750EDC38808469B9846B077EE5C0C942" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceOwnersNonnuclearPropertyInsuranceMaximum" xlink:label="loc_evrg_NuclearLiabilityInsuranceOwnersNonnuclearPropertyInsuranceMaximum_E46D9CDD42E5B12D147A077EE5C0FB57" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:to="loc_evrg_NuclearLiabilityInsuranceOwnersNonnuclearPropertyInsuranceMaximum_E46D9CDD42E5B12D147A077EE5C0FB57" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NuclearLiabilityInsuranceOwnersPropertyInsuranceAssessmentMaximum" xlink:label="loc_evrg_NuclearLiabilityInsuranceOwnersPropertyInsuranceAssessmentMaximum_5D4AA14F451B5555A53C077EE5C04B28" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NuclearLiabilityInsuranceAbstract_09AB107278B7A9146975077EE5BFC57C" xlink:to="loc_evrg_NuclearLiabilityInsuranceOwnersPropertyInsuranceAssessmentMaximum_5D4AA14F451B5555A53C077EE5C04B28" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/CommitmentsAndContingenciesOperatingLeasesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_B5EE8DD54E8DD2D3C646076E5761B043" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_StatementTable_B5EE8DD54E8DD2D3C646076E5761B043" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1581A514F153549511BB07702258446E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_B5EE8DD54E8DD2D3C646076E5761B043" xlink:to="loc_dei_LegalEntityAxis_1581A514F153549511BB07702258446E" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_BADCCEC41DE1AFA22CC907702262C013_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1581A514F153549511BB07702258446E" xlink:to="loc_dei_EntityDomain_BADCCEC41DE1AFA22CC907702262C013_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_BADCCEC41DE1AFA22CC907702262C013" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1581A514F153549511BB07702258446E" xlink:to="loc_dei_EntityDomain_BADCCEC41DE1AFA22CC907702262C013" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_68C2FFE6B6200A369132077022B28190" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_BADCCEC41DE1AFA22CC907702262C013" xlink:to="loc_evrg_KCPLMember_68C2FFE6B6200A369132077022B28190" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_B28146DE5F2863F9F693077022DB4DFE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_BADCCEC41DE1AFA22CC907702262C013" xlink:to="loc_evrg_WestarEnergyIncMember_B28146DE5F2863F9F693077022DB4DFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:label="loc_us-gaap_OperatingLeasesRentExpenseNet_C1D58FBE3359AD102719076E57703257" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_OperatingLeasesRentExpenseNet_C1D58FBE3359AD102719076E57703257" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_0DFC55CA56A44B374D92077021835B1A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_0DFC55CA56A44B374D92077021835B1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_1AD7FCB9685CC296C0BC0770219E7AB5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_1AD7FCB9685CC296C0BC0770219E7AB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_1663C5FC6170805FDF5C077021BF591B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_1663C5FC6170805FDF5C077021BF591B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_90B6D4C2C3773A2F0CBF077021D91179" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_90B6D4C2C3773A2F0CBF077021D91179" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_164E8C867CE3B9DDE264077021F41CEB" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_164E8C867CE3B9DDE264077021F41CEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_4062A86B8D9524D9271C07702215D814" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_4062A86B8D9524D9271C07702215D814" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_D2BBFEA10513233F7AED07702236BB7D" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4234ABE636AA17CC2471076E5762101F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_D2BBFEA10513233F7AED07702236BB7D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_084654776CF9B2F51AE908A06E3A682D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_BB036D35670D2429FF5B08A06E380503" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_084654776CF9B2F51AE908A06E3A682D" xlink:to="loc_us-gaap_StatementTable_BB036D35670D2429FF5B08A06E380503" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_CEF9B36DAB6B035FD46D08A06E387B62" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_BB036D35670D2429FF5B08A06E380503" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_CEF9B36DAB6B035FD46D08A06E387B62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_26F2DB1B69AABCE4CD6808A06E38BD19_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_CEF9B36DAB6B035FD46D08A06E387B62" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_26F2DB1B69AABCE4CD6808A06E38BD19_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_26F2DB1B69AABCE4CD6808A06E38BD19" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_CEF9B36DAB6B035FD46D08A06E387B62" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_26F2DB1B69AABCE4CD6808A06E38BD19" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_1F7EFC3C5792C074B55308A06E39CD36" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_26F2DB1B69AABCE4CD6808A06E38BD19" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_1F7EFC3C5792C074B55308A06E39CD36" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_7FC9D6D08D73B547D6EF08A06E393BC2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_BB036D35670D2429FF5B08A06E380503" xlink:to="loc_dei_LegalEntityAxis_7FC9D6D08D73B547D6EF08A06E393BC2" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_86144D3DF9BDC925924B08A06E39CAAE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7FC9D6D08D73B547D6EF08A06E393BC2" xlink:to="loc_dei_EntityDomain_86144D3DF9BDC925924B08A06E39CAAE_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_86144D3DF9BDC925924B08A06E39CAAE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7FC9D6D08D73B547D6EF08A06E393BC2" xlink:to="loc_dei_EntityDomain_86144D3DF9BDC925924B08A06E39CAAE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_9F769905900528C1A3DC08A06E39BDA5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_86144D3DF9BDC925924B08A06E39CAAE" xlink:to="loc_evrg_WestarEnergyIncMember_9F769905900528C1A3DC08A06E39BDA5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_7956B13C000034B635BA08A06E3A4834" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_86144D3DF9BDC925924B08A06E39CAAE" xlink:to="loc_evrg_KCPLMember_7956B13C000034B635BA08A06E3A4834" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_07CAF0745BF9F1CE38E608A06E3A6AFD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_084654776CF9B2F51AE908A06E3A682D" xlink:to="loc_us-gaap_AssetsAbstract_07CAF0745BF9F1CE38E608A06E3A6AFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_07CAF0745BF9F1CE38E608A06E3A6AFD" xlink:to="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7E4E3DADD3412312733708A06E3BE9F5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7E4E3DADD3412312733708A06E3BE9F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivablesNetCurrent" xlink:label="loc_us-gaap_ReceivablesNetCurrent_F287816937B030674E0F08A06E3BCE36" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_ReceivablesNetCurrent_F287816937B030674E0F08A06E3BCE36" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableRelatedPartiesCurrent" xlink:label="loc_us-gaap_AccountsReceivableRelatedPartiesCurrent_B182B9EF26B0E10A544208A06E3BC1CE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_AccountsReceivableRelatedPartiesCurrent_B182B9EF26B0E10A544208A06E3BC1CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount" xlink:label="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount_9E4B72967E1B108A963108A06E3B5D60" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount_9E4B72967E1B108A963108A06E3B5D60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EnergyRelatedInventory" xlink:label="loc_us-gaap_EnergyRelatedInventory_89097CA563CA8BF125DE08A06E3B0A74" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_EnergyRelatedInventory_89097CA563CA8BF125DE08A06E3B0A74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="loc_us-gaap_IncomeTaxesReceivable_12E5812E9220A50CFA8E08A06E3CF6AA" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_IncomeTaxesReceivable_12E5812E9220A50CFA8E08A06E3CF6AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="loc_us-gaap_RegulatoryAssetsCurrent_AD80D4AE3E60391DF29808A06E3C3561" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_RegulatoryAssetsCurrent_AD80D4AE3E60391DF29808A06E3C3561" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_FC0D03B4B9F832C7A7F008A06E3CC6EC" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_FC0D03B4B9F832C7A7F008A06E3CC6EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_3B82221C567F35A8C32008A06E3C89F5" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_C05CB79E0F667CEC6D3408A06E3A6A02" xlink:to="loc_us-gaap_AssetsCurrent_3B82221C567F35A8C32008A06E3C89F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_C331F01CE94EABCAEE1408A06E3CBEF2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_07CAF0745BF9F1CE38E608A06E3A6AFD" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_C331F01CE94EABCAEE1408A06E3CBEF2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InvestmentsAndOtherAssetsAbstract" xlink:label="loc_evrg_InvestmentsAndOtherAssetsAbstract_45B4269A099AF667F29F08A06E3DDDD6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_07CAF0745BF9F1CE38E608A06E3A6AFD" xlink:to="loc_evrg_InvestmentsAndOtherAssetsAbstract_45B4269A099AF667F29F08A06E3DDDD6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_A5F7B0C25C7B02C4661808A06E3D9D3E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_45B4269A099AF667F29F08A06E3DDDD6" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_A5F7B0C25C7B02C4661808A06E3D9D3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DecommissioningFundInvestments" xlink:label="loc_us-gaap_DecommissioningFundInvestments_3DA7C39935568B087D4E08A06E3D8F28" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_45B4269A099AF667F29F08A06E3DDDD6" xlink:to="loc_us-gaap_DecommissioningFundInvestments_3DA7C39935568B087D4E08A06E3D8F28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_706C222FE13577D73CDE08A06E3D070A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_45B4269A099AF667F29F08A06E3DDDD6" xlink:to="loc_us-gaap_Goodwill_706C222FE13577D73CDE08A06E3D070A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_7FB1853738816A4904C408A06E3DB170" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_45B4269A099AF667F29F08A06E3DDDD6" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_7FB1853738816A4904C408A06E3DB170" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaap_AssetsNoncurrent_A5EBF6728B634ACEC32208A06E3E7EB1" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_45B4269A099AF667F29F08A06E3DDDD6" xlink:to="loc_us-gaap_AssetsNoncurrent_A5EBF6728B634ACEC32208A06E3E7EB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_E142D0B072D7E052F3BC08A06E3E980C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_45B4269A099AF667F29F08A06E3DDDD6" xlink:to="loc_us-gaap_Assets_E142D0B072D7E052F3BC08A06E3E980C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_27FAF4C7736A8D881BAF08A06E3EF903" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_084654776CF9B2F51AE908A06E3A682D" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_27FAF4C7736A8D881BAF08A06E3EF903" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_27FAF4C7736A8D881BAF08A06E3EF903" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_C3D99135F11566D4F0A708A06E3EAECE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_LongTermDebtCurrent_C3D99135F11566D4F0A708A06E3EAECE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermBankLoansAndNotesPayable" xlink:label="loc_us-gaap_ShortTermBankLoansAndNotesPayable_827293967CC160B0CE1B08A06E3FD2C1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_ShortTermBankLoansAndNotesPayable_827293967CC160B0CE1B08A06E3FD2C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount" xlink:label="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount_BA35F7A63D3B362CD8A108A06E3F8668" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount_BA35F7A63D3B362CD8A108A06E3F8668" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_B37BC48D45F7744FCECF08A06E3F2F70" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_AccountsPayableCurrent_B37BC48D45F7744FCECF08A06E3F2F70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableRelatedPartiesCurrent" xlink:label="loc_us-gaap_AccountsPayableRelatedPartiesCurrent_8764ED1393DA0205B42508A06E3F8C04" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_AccountsPayableRelatedPartiesCurrent_8764ED1393DA0205B42508A06E3F8C04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableCurrent" xlink:label="loc_us-gaap_DividendsPayableCurrent_76E85EBE9753D442F37E08A06E3F8245" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_DividendsPayableCurrent_76E85EBE9753D442F37E08A06E3F8245" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxesPayableCurrent" xlink:label="loc_us-gaap_TaxesPayableCurrent_6DCE4244AF0C16781A1D08A06E3FC10C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_TaxesPayableCurrent_6DCE4244AF0C16781A1D08A06E3FC10C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:label="loc_us-gaap_InterestPayableCurrent_B728C03F04C37F80394A08A06E40F41C" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_InterestPayableCurrent_B728C03F04C37F80394A08A06E40F41C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityCurrent_324B23548B7E4219AAA708A06E406FA5" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_RegulatoryLiabilityCurrent_324B23548B7E4219AAA708A06E406FA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationCurrent" xlink:label="loc_us-gaap_AssetRetirementObligationCurrent_C6A71FEA7C63FAEC729608A06E45647A" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_AssetRetirementObligationCurrent_C6A71FEA7C63FAEC729608A06E45647A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_4C975F63D12197F3F55A08A06E4553BF" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_4C975F63D12197F3F55A08A06E4553BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_951BE270645C6DED1CA508A06E463B9A" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_E1E8CB542C170225A83408A06E3ECAF6" xlink:to="loc_us-gaap_LiabilitiesCurrent_951BE270645C6DED1CA508A06E463B9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_27FAF4C7736A8D881BAF08A06E3EF903" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_4D38CD4F78E1B9A3453908A06E466DD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_4D38CD4F78E1B9A3453908A06E466DD2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_9BB594C4F5722E69472808A06E465957" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_9BB594C4F5722E69472808A06E465957" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDeferredInvestmentTaxCredit" xlink:label="loc_us-gaap_AccumulatedDeferredInvestmentTaxCredit_71647595166EFBF78F6E08A06E4677AB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:to="loc_us-gaap_AccumulatedDeferredInvestmentTaxCredit_71647595166EFBF78F6E08A06E4677AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_D469ADA944A9FFD97F9908A06E4745EF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_D469ADA944A9FFD97F9908A06E4745EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_9CB62B1C084C48504C2208A06E47B928" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_9CB62B1C084C48504C2208A06E47B928" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_29471F3B4ADABA55A89C08A06E47FDF6" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_29471F3B4ADABA55A89C08A06E47FDF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_65ECC63FC898F080264108A06E4798CA" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_65ECC63FC898F080264108A06E4798CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_44F4E89CEA90AFB2A03A08A06E477E75" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_D63EF01FA36AD4DE9C5A08A06E46BDAC" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_44F4E89CEA90AFB2A03A08A06E477E75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_39CE7CF13C3260299D6308A06E48BC97" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_27FAF4C7736A8D881BAF08A06E3EF903" xlink:to="loc_us-gaap_CommitmentsAndContingencies_39CE7CF13C3260299D6308A06E48BC97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_7AC9ACFA432D5989C0F008A06E48E2F8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_27FAF4C7736A8D881BAF08A06E3EF903" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_7AC9ACFA432D5989C0F008A06E48E2F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_3AB661D35D128AA13D5308A06E488304" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_7AC9ACFA432D5989C0F008A06E48E2F8" xlink:to="loc_us-gaap_StockholdersEquityAbstract_3AB661D35D128AA13D5308A06E488304" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_C6C81421D41A0A72123208A06E48061C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3AB661D35D128AA13D5308A06E488304" xlink:to="loc_us-gaap_CommonStockValue_C6C81421D41A0A72123208A06E48061C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_A92262247D3C9FAB666708A06E49A22C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3AB661D35D128AA13D5308A06E488304" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_A92262247D3C9FAB666708A06E49A22C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_A405FEED8E736E5F557A08A06E49E1B5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3AB661D35D128AA13D5308A06E488304" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_A405FEED8E736E5F557A08A06E49E1B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_363ADC9BB351DF01A4F208A06E49EEB6" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3AB661D35D128AA13D5308A06E488304" xlink:to="loc_us-gaap_StockholdersEquity_363ADC9BB351DF01A4F208A06E49EEB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_373B922BC981B57EA87C08A06E4907FF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_7AC9ACFA432D5989C0F008A06E48E2F8" xlink:to="loc_us-gaap_MinorityInterest_373B922BC981B57EA87C08A06E4907FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_BB3CC4927FDA545E791108A06E49FAE2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_7AC9ACFA432D5989C0F008A06E48E2F8" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_BB3CC4927FDA545E791108A06E49FAE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_76F2C148928A0A1B398208A06E496A0F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_27FAF4C7736A8D881BAF08A06E3EF903" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_76F2C148928A0A1B398208A06E496A0F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_28DA854B7700E15D5E971A3D03D781E5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_176583C1299EE52FC4271A3D03D72BDA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_28DA854B7700E15D5E971A3D03D781E5" xlink:to="loc_us-gaap_StatementTable_176583C1299EE52FC4271A3D03D72BDA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_684EF26BEBA8273DA80E1A3D03D7471B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_176583C1299EE52FC4271A3D03D72BDA" xlink:to="loc_dei_LegalEntityAxis_684EF26BEBA8273DA80E1A3D03D7471B" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_562DE5231621D297CB7B1A3D03D7802D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_684EF26BEBA8273DA80E1A3D03D7471B" xlink:to="loc_dei_EntityDomain_562DE5231621D297CB7B1A3D03D7802D_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_562DE5231621D297CB7B1A3D03D7802D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_684EF26BEBA8273DA80E1A3D03D7471B" xlink:to="loc_dei_EntityDomain_562DE5231621D297CB7B1A3D03D7802D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_57894F2D303FD7BEAC081A3D03D758BE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_562DE5231621D297CB7B1A3D03D7802D" xlink:to="loc_evrg_WestarEnergyIncMember_57894F2D303FD7BEAC081A3D03D758BE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_2D7800F7C00BA791FB271A3D03D76535" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_562DE5231621D297CB7B1A3D03D7802D" xlink:to="loc_evrg_KCPLMember_2D7800F7C00BA791FB271A3D03D76535" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7CAA6550DC8FB2E74DB01A3D03D7953B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28DA854B7700E15D5E971A3D03D781E5" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7CAA6550DC8FB2E74DB01A3D03D7953B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_3EE62652B951B67EC1C51A3D03D71980" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_7CAA6550DC8FB2E74DB01A3D03D7953B" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_3EE62652B951B67EC1C51A3D03D71980" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="loc_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_FAF35BAA66488B5413121A3D03D797E9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_3EE62652B951B67EC1C51A3D03D71980" xlink:to="loc_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_FAF35BAA66488B5413121A3D03D797E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_80DDFEAB98C4AC5BD5BF1A3D03D7EE00" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_FAF35BAA66488B5413121A3D03D797E9" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_80DDFEAB98C4AC5BD5BF1A3D03D7EE00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_4AA7900573F3E1BDE73F1A3D03D7167E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_FAF35BAA66488B5413121A3D03D797E9" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_4AA7900573F3E1BDE73F1A3D03D7167E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_8A17A66A525F1FA2592D1A3D03D748F3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_FAF35BAA66488B5413121A3D03D797E9" xlink:to="loc_us-gaap_CommonStockSharesIssued_8A17A66A525F1FA2592D1A3D03D748F3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_791ECC0305CD62548F4D08FE9C4F8A99" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_CB479C3DC5B4E99E3E0E08FE9C4D840F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_791ECC0305CD62548F4D08FE9C4F8A99" xlink:to="loc_us-gaap_StatementTable_CB479C3DC5B4E99E3E0E08FE9C4D840F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9DC7E9E91328E1F52AED08FE9C4E7CE7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_CB479C3DC5B4E99E3E0E08FE9C4D840F" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9DC7E9E91328E1F52AED08FE9C4E7CE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_F3360B14B427AFBB584908FE9C4E3DB1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9DC7E9E91328E1F52AED08FE9C4E7CE7" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_F3360B14B427AFBB584908FE9C4E3DB1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_F3360B14B427AFBB584908FE9C4E3DB1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9DC7E9E91328E1F52AED08FE9C4E7CE7" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_F3360B14B427AFBB584908FE9C4E3DB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_1C36CF88421CD2BD346108FE9C4E4F48" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_F3360B14B427AFBB584908FE9C4E3DB1" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_1C36CF88421CD2BD346108FE9C4E4F48" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_3FA244FA0FA37623A49708FE9C4E8E6B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_CB479C3DC5B4E99E3E0E08FE9C4D840F" xlink:to="loc_dei_LegalEntityAxis_3FA244FA0FA37623A49708FE9C4E8E6B" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_29D82DB804D02FEB12B008FE9C4F07C1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3FA244FA0FA37623A49708FE9C4E8E6B" xlink:to="loc_dei_EntityDomain_29D82DB804D02FEB12B008FE9C4F07C1_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_29D82DB804D02FEB12B008FE9C4F07C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3FA244FA0FA37623A49708FE9C4E8E6B" xlink:to="loc_dei_EntityDomain_29D82DB804D02FEB12B008FE9C4F07C1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_C7E2B0770F18AF4382B308FE9C4F178C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_29D82DB804D02FEB12B008FE9C4F07C1" xlink:to="loc_evrg_WestarEnergyIncMember_C7E2B0770F18AF4382B308FE9C4F178C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_44E5DA3F092341CCAFE108FE9C4F2302" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_29D82DB804D02FEB12B008FE9C4F07C1" xlink:to="loc_evrg_KCPLMember_44E5DA3F092341CCAFE108FE9C4F2302" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_9CA27571576C72AD097708FE9C50A153" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_791ECC0305CD62548F4D08FE9C4F8A99" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_9CA27571576C72AD097708FE9C50A153" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B4AE6DB25205E8DDA60B08FE9C50CC8C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_791ECC0305CD62548F4D08FE9C4F8A99" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B4AE6DB25205E8DDA60B08FE9C50CC8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_239F848A682E716F7ED808FE9C50363E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B4AE6DB25205E8DDA60B08FE9C50CC8C" xlink:to="loc_us-gaap_ProfitLoss_239F848A682E716F7ED808FE9C50363E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B4AE6DB25205E8DDA60B08FE9C50CC8C" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_CACCCBD2D5BC57711F3E08FE9C516949" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_us-gaap_DepreciationAndAmortization_CACCCBD2D5BC57711F3E08FE9C516949" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmortizationOfNuclearFuel" xlink:label="loc_evrg_AmortizationOfNuclearFuel_7E1A7B808216613A15EE08FE9C515771" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_evrg_AmortizationOfNuclearFuel_7E1A7B808216613A15EE08FE9C515771" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmortizationOfDeferredRefuelingOutageCosts" xlink:label="loc_evrg_AmortizationOfDeferredRefuelingOutageCosts_4203894733E80B0D501508FE9C519AD2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_evrg_AmortizationOfDeferredRefuelingOutageCosts_4203894733E80B0D501508FE9C519AD2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmortizationOfSaleLeasebackTransaction" xlink:label="loc_evrg_AmortizationOfSaleLeasebackTransaction_03092C23F0ECC0A69BD408FE9C52E3D9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_evrg_AmortizationOfSaleLeasebackTransaction_03092C23F0ECC0A69BD408FE9C52E3D9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmortizationOfCorporateOwnedLifeInsurance" xlink:label="loc_evrg_AmortizationOfCorporateOwnedLifeInsurance_F73FE73D710ACC36789908FE9C5260C5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_evrg_AmortizationOfCorporateOwnedLifeInsurance_F73FE73D710ACC36789908FE9C5260C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfProperties" xlink:label="loc_us-gaap_GainLossOnSaleOfProperties_64B0BC1C7C075AA80D3308FE9C527266" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_us-gaap_GainLossOnSaleOfProperties_64B0BC1C7C075AA80D3308FE9C527266" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_87434BF132ABB1485D0008FE9C52B521" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_us-gaap_ShareBasedCompensation_87434BF132ABB1485D0008FE9C52B521" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_EF04753D9B9956E9E42108FE9C521367" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_EF04753D9B9956E9E42108FE9C521367" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction" xlink:label="loc_us-gaap_IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction_F8A88C6FC48D4FC7858E08FE9C52777A" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_us-gaap_IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction_F8A88C6FC48D4FC7858E08FE9C52777A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PaymentsForAssetRetirementObligations" xlink:label="loc_evrg_PaymentsForAssetRetirementObligations_B91B56C3FB27391A8A6608FE9C531C9C" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_evrg_PaymentsForAssetRetirementObligations_B91B56C3FB27391A8A6608FE9C531C9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_2B573832535C2CA8F79908FE9C539B92" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_2B573832535C2CA8F79908FE9C539B92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_BCF3FD03B22B9B87778A08FE9C53DEC4" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_BCF3FD03B22B9B87778A08FE9C53DEC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_D395A6C4062B8002545708FE9C507262" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_D30716E72AC2B80CF5F508FE9C530C2D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_D30716E72AC2B80CF5F508FE9C530C2D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncreaseDecreaseInAccountsReceivablePledgedAsCollateral" xlink:label="loc_evrg_IncreaseDecreaseInAccountsReceivablePledgedAsCollateral_658A0FC470A8F5ED0D2308FE9C53EB37" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_evrg_IncreaseDecreaseInAccountsReceivablePledgedAsCollateral_658A0FC470A8F5ED0D2308FE9C53EB37" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncreaseDecreaseInEnergyRelatedInventory" xlink:label="loc_evrg_IncreaseDecreaseInEnergyRelatedInventory_69D9CB19BF2301BE8F5608FE9C537A48" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_evrg_IncreaseDecreaseInEnergyRelatedInventory_69D9CB19BF2301BE8F5608FE9C537A48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_5E6C824D3F969778254A08FE9C535295" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_5E6C824D3F969778254A08FE9C535295" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_CAFA3AC708180D47E4FE08FE9C53209A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_CAFA3AC708180D47E4FE08FE9C53209A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedTaxesPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedTaxesPayable_FE772F357105264B289608FE9C536450" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedTaxesPayable_FE772F357105264B289608FE9C536450" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_2EE0F833DFB9E52AA95D08FE9C53D0BD" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_2EE0F833DFB9E52AA95D08FE9C53D0BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_DBCCC72BF0A547D8D5B308FE9C532451" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_DBCCC72BF0A547D8D5B308FE9C532451" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_8D0860DF5F693D736C7908FE9C53E9EF" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_9D988F6158D8444879FA08FE9C53260A" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_8D0860DF5F693D736C7908FE9C53E9EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5A9FE884AA776BE1E18508FE9C5359EB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_B4AE6DB25205E8DDA60B08FE9C50CC8C" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5A9FE884AA776BE1E18508FE9C5359EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_791ECC0305CD62548F4D08FE9C4F8A99" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A2856FC1B0D134059B2A08FE9C538EE6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A2856FC1B0D134059B2A08FE9C538EE6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_B6195488407DC543190B08FE9C539658" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_B6195488407DC543190B08FE9C539658" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToInvestInDecommissioningFund" xlink:label="loc_us-gaap_PaymentsToInvestInDecommissioningFund_C8EA531AF1B178565B0108FE9C532B81" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_us-gaap_PaymentsToInvestInDecommissioningFund_C8EA531AF1B178565B0108FE9C532B81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromDecommissioningFund" xlink:label="loc_us-gaap_ProceedsFromDecommissioningFund_B3F637390B3CBEBD628E08FE9C530740" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_us-gaap_ProceedsFromDecommissioningFund_B3F637390B3CBEBD628E08FE9C530740" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PurchaseOfCorporateOwnedLifeInsurance" xlink:label="loc_evrg_PurchaseOfCorporateOwnedLifeInsurance_88B0060535C15F40F40408FE9C53DD84" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_evrg_PurchaseOfCorporateOwnedLifeInsurance_88B0060535C15F40F40408FE9C53DD84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromLifeInsurancePolicies" xlink:label="loc_us-gaap_ProceedsFromLifeInsurancePolicies_5A02E7479D8E0CB7016E08FE9C533F87" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_us-gaap_ProceedsFromLifeInsurancePolicies_5A02E7479D8E0CB7016E08FE9C533F87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities" xlink:label="loc_us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities_2E44E0D870918E3A97CA08FE9C53C9D5" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities_2E44E0D870918E3A97CA08FE9C53C9D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_27B4944DF0772AB35E3B08FE9C537830" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_27B4944DF0772AB35E3B08FE9C537830" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_2D38D4B30E775C3223EB08FE9C5375CA" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_C38A57B99B523A421FC708FE9C530365" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_2D38D4B30E775C3223EB08FE9C5375CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_791ECC0305CD62548F4D08FE9C4F8A99" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_BC0E6A76E7016F1E894408FE9C53ED46" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_BC0E6A76E7016F1E894408FE9C53ED46" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ProceedsFromIssuanceOfCollateralizedDebt" xlink:label="loc_evrg_ProceedsFromIssuanceOfCollateralizedDebt_8FE1C366B46E38DC1C6908FE9C536F47" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_evrg_ProceedsFromIssuanceOfCollateralizedDebt_8FE1C366B46E38DC1C6908FE9C536F47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_678366D412EEBA972CE308FE9C53E9DD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_678366D412EEBA972CE308FE9C53E9DD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ProceedsFromLTDVIE" xlink:label="loc_evrg_ProceedsFromLTDVIE_0180C2C140A5396DC1D508FE9C538349" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_evrg_ProceedsFromLTDVIE_0180C2C140A5396DC1D508FE9C538349" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_0B7731A5CC99E781211108FE9C53925B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_0B7731A5CC99E781211108FE9C53925B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RetirementsofLongTermDebtOfVIEs" xlink:label="loc_evrg_RetirementsofLongTermDebtOfVIEs_DA34DB390E8C8DFD77B008FE9C539C7B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_evrg_RetirementsofLongTermDebtOfVIEs_DA34DB390E8C8DFD77B008FE9C539C7B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ProceedsFromBorrowingsAgainstCorporateOwnedLifeInsurance" xlink:label="loc_evrg_ProceedsFromBorrowingsAgainstCorporateOwnedLifeInsurance_1E5B6CC1255E4899826A08FE9C53596D" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_evrg_ProceedsFromBorrowingsAgainstCorporateOwnedLifeInsurance_1E5B6CC1255E4899826A08FE9C53596D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RepaymentsOfBorrowingsAgainstCorporateOwnedLifeInsurance" xlink:label="loc_evrg_RepaymentsOfBorrowingsAgainstCorporateOwnedLifeInsurance_106D0B62CAA6E65BDB9008FE9C53A0D9" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_evrg_RepaymentsOfBorrowingsAgainstCorporateOwnedLifeInsurance_106D0B62CAA6E65BDB9008FE9C53A0D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToMinorityShareholders" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_1BFDF9C2AE770358A8AC08FE9C53BE13" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_us-gaap_PaymentsToMinorityShareholders_1BFDF9C2AE770358A8AC08FE9C53BE13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_2295ADF8122A9C2B700E08FE9C533199" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_us-gaap_PaymentsOfDividends_2295ADF8122A9C2B700E08FE9C533199" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_22CF16C903615AC96F4C08FE9C539E39" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_22CF16C903615AC96F4C08FE9C539E39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_F32E92C7162A5CAB26E508FE9C53F554" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_F32E92C7162A5CAB26E508FE9C53F554" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_21AA3D06CE24A0E5A52708FE9C5360E0" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B7FD00554818BA97265D08FE9C5334EB" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_21AA3D06CE24A0E5A52708FE9C5360E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_6364274C45768C74999F08FE9C531FDE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_791ECC0305CD62548F4D08FE9C4F8A99" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_6364274C45768C74999F08FE9C531FDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffectAbstract" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffectAbstract_B1E2510C75033CA7CEF808FE9C53C97A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_791ECC0305CD62548F4D08FE9C4F8A99" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffectAbstract_B1E2510C75033CA7CEF808FE9C53C97A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_D6CFF31D4DDF2F1D95D608FE9C53608B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffectAbstract_B1E2510C75033CA7CEF808FE9C53C97A" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_D6CFF31D4DDF2F1D95D608FE9C53608B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_D1513F1637F1172C4F1EF3575AEF1A96" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_BD3255CF47F3C9D25BAAF3575AEEC6FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_D1513F1637F1172C4F1EF3575AEF1A96" xlink:to="loc_us-gaap_StatementTable_BD3255CF47F3C9D25BAAF3575AEEC6FB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_0BE282E7883F273BD944F3575AEF7199" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_BD3255CF47F3C9D25BAAF3575AEEC6FB" xlink:to="loc_dei_LegalEntityAxis_0BE282E7883F273BD944F3575AEF7199" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_737C1B08CE76E4031AA1F3575AEF041F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_0BE282E7883F273BD944F3575AEF7199" xlink:to="loc_dei_EntityDomain_737C1B08CE76E4031AA1F3575AEF041F_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_737C1B08CE76E4031AA1F3575AEF041F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_0BE282E7883F273BD944F3575AEF7199" xlink:to="loc_dei_EntityDomain_737C1B08CE76E4031AA1F3575AEF041F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_767BDF27302ED2EFAFB5F3575AEFE4EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_737C1B08CE76E4031AA1F3575AEF041F" xlink:to="loc_evrg_WestarEnergyIncMember_767BDF27302ED2EFAFB5F3575AEFE4EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_B6E7365190A5713D2E21F3575AF07653" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_D1513F1637F1172C4F1EF3575AEF1A96" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_B6E7365190A5713D2E21F3575AF07653" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfChangesInEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_5F8F052E88246649BC7B077EE9191306" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_D08B068787A12D423454077EE916C5E8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_5F8F052E88246649BC7B077EE9191306" xlink:to="loc_us-gaap_StatementTable_D08B068787A12D423454077EE916C5E8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_B68FC28BE5C61DA79D7F077EE916D0CA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_D08B068787A12D423454077EE916C5E8" xlink:to="loc_dei_LegalEntityAxis_B68FC28BE5C61DA79D7F077EE916D0CA" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_747C6DB996FCB5546A84077EE9176E15_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_B68FC28BE5C61DA79D7F077EE916D0CA" xlink:to="loc_dei_EntityDomain_747C6DB996FCB5546A84077EE9176E15_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_747C6DB996FCB5546A84077EE9176E15" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_B68FC28BE5C61DA79D7F077EE916D0CA" xlink:to="loc_dei_EntityDomain_747C6DB996FCB5546A84077EE9176E15" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_B0BF97505E973A85E095077EE917175F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_747C6DB996FCB5546A84077EE9176E15" xlink:to="loc_evrg_WestarEnergyIncMember_B0BF97505E973A85E095077EE917175F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_8D40805B2B3B659548D1077EE9171B8D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_747C6DB996FCB5546A84077EE9176E15" xlink:to="loc_evrg_KCPLMember_8D40805B2B3B659548D1077EE9171B8D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_B7F23EC4849C4CCCCF41077EE918DF96" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_D08B068787A12D423454077EE916C5E8" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_B7F23EC4849C4CCCCF41077EE918DF96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_DAC68FB8A4029BA19A1D077EE91822C3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_B7F23EC4849C4CCCCF41077EE918DF96" xlink:to="loc_us-gaap_EquityComponentDomain_DAC68FB8A4029BA19A1D077EE91822C3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_DAC68FB8A4029BA19A1D077EE91822C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_B7F23EC4849C4CCCCF41077EE918DF96" xlink:to="loc_us-gaap_EquityComponentDomain_DAC68FB8A4029BA19A1D077EE91822C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_2D43C28477EDF8B40E17077EE91806B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_DAC68FB8A4029BA19A1D077EE91822C3" xlink:to="loc_us-gaap_CommonStockMember_2D43C28477EDF8B40E17077EE91806B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_1A3D8518D134476EE846077EE9182292" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_DAC68FB8A4029BA19A1D077EE91822C3" xlink:to="loc_us-gaap_RetainedEarningsMember_1A3D8518D134476EE846077EE9182292" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_B79541A48072D581F2A2077EE91898AC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_DAC68FB8A4029BA19A1D077EE91822C3" xlink:to="loc_us-gaap_NoncontrollingInterestMember_B79541A48072D581F2A2077EE91898AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_6D62762D626DC24F02D0077EE919B129" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_DAC68FB8A4029BA19A1D077EE91822C3" xlink:to="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_6D62762D626DC24F02D0077EE919B129" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_5F8F052E88246649BC7B077EE9191306" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_8D9E8F2A983225716FAD077EE919A81D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_SharesOutstanding_8D9E8F2A983225716FAD077EE919A81D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_12BE2883BE95AEAF1FB3077EE91A7B56" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_12BE2883BE95AEAF1FB3077EE91A7B56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_1DC52FCC6B5D0CCD0F71077EE91A8D5A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_ProfitLoss_1DC52FCC6B5D0CCD0F71077EE91A8D5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_6D3F98965C1075F575FC077EE91A1F0F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_6D3F98965C1075F575FC077EE91A1F0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_4061F908CD82F0453FA1077EE91AE677" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_4061F908CD82F0453FA1077EE91AE677" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_DB2B94929C640C575ADF077EE91AF73F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_DB2B94929C640C575ADF077EE91AF73F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_E2B6F6D4019A7D5E7479077EE91A82EE" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_E2B6F6D4019A7D5E7479077EE91A82EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_E886A61F0D4D3A3A0737077EE91B4ECC" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_E886A61F0D4D3A3A0737077EE91B4ECC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_6684521B0C86DE85BD50077EE91BEBE4" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_6684521B0C86DE85BD50077EE91BEBE4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_StockIssuedDuringPeriodSharesDividendReinvestmentPlanAndShareBasedCompensation" xlink:label="loc_evrg_StockIssuedDuringPeriodSharesDividendReinvestmentPlanAndShareBasedCompensation_9F9AC46DB84222D91DA8077EE91B6117" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_evrg_StockIssuedDuringPeriodSharesDividendReinvestmentPlanAndShareBasedCompensation_9F9AC46DB84222D91DA8077EE91B6117" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_StockIssuedDuringPeriodValueDividendReinvestmentPlanAndShareBasedCompensation" xlink:label="loc_evrg_StockIssuedDuringPeriodValueDividendReinvestmentPlanAndShareBasedCompensation_F83873F63DBE312C4C0C077EE91B1006" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_evrg_StockIssuedDuringPeriodValueDividendReinvestmentPlanAndShareBasedCompensation_F83873F63DBE312C4C0C077EE91B1006" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_B2911580ED2F6DB0B6BB077EE91BB903" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_B2911580ED2F6DB0B6BB077EE91BB903" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="loc_us-gaap_DividendsCommonStockCash_A7BB76C438D866AEFEF9077EE91BFA30" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_DividendsCommonStockCash_A7BB76C438D866AEFEF9077EE91BFA30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsShareBasedCompensation" xlink:label="loc_us-gaap_DividendsShareBasedCompensation_083C865F584B59076619077EE91C2AB7" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_DividendsShareBasedCompensation_083C865F584B59076619077EE91C2AB7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_690EA3AFEC14C501086C077EE91CFE82" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_690EA3AFEC14C501086C077EE91CFE82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation" xlink:label="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_25EE095763F203234003077EE91CC0DC" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_25EE095763F203234003077EE91CC0DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_2DB70DD97D54B5F11E06077EE91C2CB1" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_2DB70DD97D54B5F11E06077EE91C2CB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_2E1EC3B4B2C2B92F4912077EE91CBC6B" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_2E1EC3B4B2C2B92F4912077EE91CBC6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_5260E5E047C647AA6F28077EE91C2951" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_5260E5E047C647AA6F28077EE91C2951" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_D9F7371D5195DC916459077EE91DA7CD" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_D9F7371D5195DC916459077EE91DA7CD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_StockCanceledDuringPeriodShares" xlink:label="loc_evrg_StockCanceledDuringPeriodShares_C3BCF08DE63FBD4E4B23077EE91D334E" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_evrg_StockCanceledDuringPeriodShares_C3BCF08DE63FBD4E4B23077EE91D334E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_StockCanceledDuringPeriodValue" xlink:label="loc_evrg_StockCanceledDuringPeriodValue_E770F8426CE621375413077EE91D8901" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_evrg_StockCanceledDuringPeriodValue_E770F8426CE621375413077EE91D8901" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_A4F6E237C014F8B94409077EE91D275B" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_A4F6E237C014F8B94409077EE91D275B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_473E6700EE39C9096427077EE91D2387" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_473E6700EE39C9096427077EE91D2387" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityOther" xlink:label="loc_us-gaap_StockholdersEquityOther_714CD53058402E9515EB077EE91DD0C9" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_41A67DE27C230C5AC577077EE919DA7F" xlink:to="loc_us-gaap_StockholdersEquityOther_714CD53058402E9515EB077EE91DD0C9" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfChangesInEquityParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_91E7348CBAEDD6091DF10D375B702604" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_CB30568C24714F3DC1580D375B6EAF8E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_91E7348CBAEDD6091DF10D375B702604" xlink:to="loc_us-gaap_StatementTable_CB30568C24714F3DC1580D375B6EAF8E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_BCB3A4AFBF8A841CA6C30D375B6F84F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_CB30568C24714F3DC1580D375B6EAF8E" xlink:to="loc_dei_LegalEntityAxis_BCB3A4AFBF8A841CA6C30D375B6F84F1" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_95E782DBA261789D12630D375B6FBF02_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_BCB3A4AFBF8A841CA6C30D375B6F84F1" xlink:to="loc_dei_EntityDomain_95E782DBA261789D12630D375B6FBF02_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_95E782DBA261789D12630D375B6FBF02" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_BCB3A4AFBF8A841CA6C30D375B6F84F1" xlink:to="loc_dei_EntityDomain_95E782DBA261789D12630D375B6FBF02" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_F866C0E88B422B85894E0D375B6F2E32" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_95E782DBA261789D12630D375B6FBF02" xlink:to="loc_evrg_WestarEnergyIncMember_F866C0E88B422B85894E0D375B6F2E32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_A7C2D2F2CB8797F8E3BD0D375B700C69" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_91E7348CBAEDD6091DF10D375B702604" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_A7C2D2F2CB8797F8E3BD0D375B700C69" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ConsolidatedStatementsOfIncomeAndComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_07692AD94635041FDE4708E6250A27DB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_StatementTable_07692AD94635041FDE4708E6250A27DB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_7126A17D445A730F8CF408E6250A9D68" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_07692AD94635041FDE4708E6250A27DB" xlink:to="loc_dei_LegalEntityAxis_7126A17D445A730F8CF408E6250A9D68" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1DF79B64BC8143674F1408E6250AB7D2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7126A17D445A730F8CF408E6250A9D68" xlink:to="loc_dei_EntityDomain_1DF79B64BC8143674F1408E6250AB7D2_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1DF79B64BC8143674F1408E6250AB7D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7126A17D445A730F8CF408E6250A9D68" xlink:to="loc_dei_EntityDomain_1DF79B64BC8143674F1408E6250AB7D2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_F5976A3B6260F161AF1E08E6250B653D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1DF79B64BC8143674F1408E6250AB7D2" xlink:to="loc_evrg_WestarEnergyIncMember_F5976A3B6260F161AF1E08E6250B653D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_8891D0059A0C9920635D08E6250B5B6D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1DF79B64BC8143674F1408E6250AB7D2" xlink:to="loc_evrg_KCPLMember_8891D0059A0C9920635D08E6250B5B6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_306AB066A6259CBC639208E6250BA5FA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_Revenues_306AB066A6259CBC639208E6250BA5FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_EE5841F02D12E372423208E6250C85B1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_EE5841F02D12E372423208E6250C85B1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FuelAndPurchasedPower" xlink:label="loc_evrg_FuelAndPurchasedPower_44B052900EF605013CEB08E6250F7355" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_EE5841F02D12E372423208E6250C85B1" xlink:to="loc_evrg_FuelAndPurchasedPower_44B052900EF605013CEB08E6250F7355" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SPPNetworkTransmissionCosts" xlink:label="loc_evrg_SPPNetworkTransmissionCosts_979BC7265C94662C8F3108E6250FF920" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_EE5841F02D12E372423208E6250C85B1" xlink:to="loc_evrg_SPPNetworkTransmissionCosts_979BC7265C94662C8F3108E6250FF920" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_0E507EBA1F96E0ED58E008E6250FC666" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_EE5841F02D12E372423208E6250C85B1" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_0E507EBA1F96E0ED58E008E6250FC666" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_F4E4B75EA18D361C1DDB08E6250F8E9F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_EE5841F02D12E372423208E6250C85B1" xlink:to="loc_us-gaap_DepreciationAndAmortization_F4E4B75EA18D361C1DDB08E6250F8E9F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes" xlink:label="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_EB95126D8A8B1F26FEA508E62510ED9E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_EE5841F02D12E372423208E6250C85B1" xlink:to="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_EB95126D8A8B1F26FEA508E62510ED9E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_F7B6F5D6BE985FDB0CE008E62510F11D" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_EE5841F02D12E372423208E6250C85B1" xlink:to="loc_us-gaap_CostsAndExpenses_F7B6F5D6BE985FDB0CE008E62510F11D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_3E7DE2A710EC1107F8F008E62510C249" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_OperatingIncomeLoss_3E7DE2A710EC1107F8F008E62510C249" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_D12D61E607212A69E51508E625107C7D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_OtherIncomeAndExpensesAbstract_D12D61E607212A69E51508E625107C7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="loc_us-gaap_InvestmentIncomeNonoperating_1CA6D86352060A169AB608E625103AD7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_D12D61E607212A69E51508E625107C7D" xlink:to="loc_us-gaap_InvestmentIncomeNonoperating_1CA6D86352060A169AB608E625103AD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncome" xlink:label="loc_us-gaap_OtherNonoperatingIncome_6B565532B31C74E56B8D08E625118EC3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_D12D61E607212A69E51508E625107C7D" xlink:to="loc_us-gaap_OtherNonoperatingIncome_6B565532B31C74E56B8D08E625118EC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="loc_us-gaap_OtherNonoperatingExpense_553E21BAF8A8454F699608E62511837F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_D12D61E607212A69E51508E625107C7D" xlink:to="loc_us-gaap_OtherNonoperatingExpense_553E21BAF8A8454F699608E62511837F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_6C671F3C67CAF786623408E625119B50" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_D12D61E607212A69E51508E625107C7D" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_6C671F3C67CAF786623408E625119B50" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_4B5BAB8D5C634F79496808E62511EBFE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_InterestExpense_4B5BAB8D5C634F79496808E62511EBFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_4859FE123CA57E2FB16B08E62511128F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_4859FE123CA57E2FB16B08E62511128F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_449C7A7D8C627381F02508E625126A90" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_449C7A7D8C627381F02508E625126A90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_FC0A2EFC4C7DA6A6F3A508E62512ECAF" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_FC0A2EFC4C7DA6A6F3A508E62512ECAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_B6F86C7020A59E8489B008E62512A3EE" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_ProfitLoss_B6F86C7020A59E8489B008E62512A3EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_4795732A3D3CB88A8EAA08E625122702" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_4795732A3D3CB88A8EAA08E625122702" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_B5976152B26A21E7855008E625137E84" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_NetIncomeLoss_B5976152B26A21E7855008E625137E84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_04D4451C435EABE0E4AE08E62513DC05" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_EarningsPerShareBasic_04D4451C435EABE0E4AE08E62513DC05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_4FADA88AB5B7267FE06108E625138A3A" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_EarningsPerShareDiluted_4FADA88AB5B7267FE06108E625138A3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_C814AC4F0E9ACF816D7108E62513CF81" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_C814AC4F0E9ACF816D7108E62513CF81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8BE7088FE16EA77A41DD08E62518E322" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8BE7088FE16EA77A41DD08E62518E322" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_66A392DA88ADD1BB637F08E625189AAE" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B580F5E503A85FFF3CCB08E6250BDEBE" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_66A392DA88ADD1BB637F08E625189AAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_811EC70E1BF6CCC1111608E62519A709" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_66A392DA88ADD1BB637F08E625189AAE" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_811EC70E1BF6CCC1111608E62519A709" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DerivativeHedgingActivityAbstract" xlink:label="loc_evrg_DerivativeHedgingActivityAbstract_D28C455E4D5B83F91B5D08E62519E895" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_811EC70E1BF6CCC1111608E62519A709" xlink:to="loc_evrg_DerivativeHedgingActivityAbstract_D28C455E4D5B83F91B5D08E62519E895" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_BE4396903585713F058208E6251ADC82" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DerivativeHedgingActivityAbstract_D28C455E4D5B83F91B5D08E62519E895" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_BE4396903585713F058208E6251ADC82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_C5EF30295331E29C6C2008E6251A1154" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DerivativeHedgingActivityAbstract_D28C455E4D5B83F91B5D08E62519E895" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_C5EF30295331E29C6C2008E6251A1154" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_3B21D61A279EF42E54CA08E6251A9E77" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DerivativeHedgingActivityAbstract_D28C455E4D5B83F91B5D08E62519E895" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_3B21D61A279EF42E54CA08E6251A9E77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax_A9ECDC4415AF639E903908E6251A214F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DerivativeHedgingActivityAbstract_D28C455E4D5B83F91B5D08E62519E895" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax_A9ECDC4415AF639E903908E6251A214F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_9E137CBB17BE67072C9A08E6251A8F24" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DerivativeHedgingActivityAbstract_D28C455E4D5B83F91B5D08E62519E895" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_9E137CBB17BE67072C9A08E6251A8F24" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPensionPlansAbstract" xlink:label="loc_evrg_DefinedBenefitPensionPlansAbstract_99F23C5AF790A2FD664108E6251B5D8B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_811EC70E1BF6CCC1111608E62519A709" xlink:to="loc_evrg_DefinedBenefitPensionPlansAbstract_99F23C5AF790A2FD664108E6251B5D8B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_1B185FBBBD863FC539E808E6251B96C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DefinedBenefitPensionPlansAbstract_99F23C5AF790A2FD664108E6251B5D8B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_1B185FBBBD863FC539E808E6251B96C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_884A7529552232CE08B308E6251BA49A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DefinedBenefitPensionPlansAbstract_99F23C5AF790A2FD664108E6251B5D8B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_884A7529552232CE08B308E6251BA49A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_79F17E31B42D1F03338508E6251B2D65" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DefinedBenefitPensionPlansAbstract_99F23C5AF790A2FD664108E6251B5D8B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_79F17E31B42D1F03338508E6251B2D65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_EDBC250F33EB7E61241F08E6251BE384" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DefinedBenefitPensionPlansAbstract_99F23C5AF790A2FD664108E6251B5D8B" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_EDBC250F33EB7E61241F08E6251BE384" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_E3665E028CEAF7FCD2FA08E6251BAA68" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_811EC70E1BF6CCC1111608E62519A709" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_E3665E028CEAF7FCD2FA08E6251BAA68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_730C111764C102D449E208E6251C2E51" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_811EC70E1BF6CCC1111608E62519A709" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_730C111764C102D449E208E6251C2E51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_EF7A3248953090D0A38508E6251C6831" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_811EC70E1BF6CCC1111608E62519A709" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_EF7A3248953090D0A38508E6251C6831" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_D66044E254E1384E299808E6251C0492" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_66A392DA88ADD1BB637F08E625189AAE" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_D66044E254E1384E299808E6251C0492" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/EquityCompensation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/EquityCompensationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2B779C3279EF2F9718B608A06AF663F7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2B779C3279EF2F9718B608A06AF663F7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_045FA5E3065BA429D29D08A06AF7550E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2B779C3279EF2F9718B608A06AF663F7" xlink:to="loc_srt_RangeAxis_045FA5E3065BA429D29D08A06AF7550E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_392D71562DF1AE5FDDAF08A06AF7DC0E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_045FA5E3065BA429D29D08A06AF7550E" xlink:to="loc_srt_RangeMember_392D71562DF1AE5FDDAF08A06AF7DC0E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_392D71562DF1AE5FDDAF08A06AF7DC0E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_045FA5E3065BA429D29D08A06AF7550E" xlink:to="loc_srt_RangeMember_392D71562DF1AE5FDDAF08A06AF7DC0E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_5EE1844D54BDE173772108A06AF773AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_392D71562DF1AE5FDDAF08A06AF7DC0E" xlink:to="loc_srt_MinimumMember_5EE1844D54BDE173772108A06AF773AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_D4010AB1102116B6103E08A06AF80A89" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2B779C3279EF2F9718B608A06AF663F7" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_D4010AB1102116B6103E08A06AF80A89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_77C2294B74CDB9D8FFFF08A06AF87DD5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_D4010AB1102116B6103E08A06AF80A89" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_77C2294B74CDB9D8FFFF08A06AF87DD5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_77C2294B74CDB9D8FFFF08A06AF87DD5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_D4010AB1102116B6103E08A06AF80A89" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_77C2294B74CDB9D8FFFF08A06AF87DD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockCompensationPlanMember" xlink:label="loc_us-gaap_StockCompensationPlanMember_791261ABE1D595DF119808A06AF81042" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_77C2294B74CDB9D8FFFF08A06AF87DD5" xlink:to="loc_us-gaap_StockCompensationPlanMember_791261ABE1D595DF119808A06AF81042" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_D9899A21C3EB314BC91108A06AF8043C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2B779C3279EF2F9718B608A06AF663F7" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_D9899A21C3EB314BC91108A06AF8043C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D5DF3B2E18D8134A125608A06AF9B128_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_D9899A21C3EB314BC91108A06AF8043C" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D5DF3B2E18D8134A125608A06AF9B128_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D5DF3B2E18D8134A125608A06AF9B128" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_D9899A21C3EB314BC91108A06AF8043C" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D5DF3B2E18D8134A125608A06AF9B128" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_050C12BE6D0A74119A2E08A06AF913A3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D5DF3B2E18D8134A125608A06AF9B128" xlink:to="loc_evrg_GreatPlainsEnergyMember_050C12BE6D0A74119A2E08A06AF913A3" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_FA12CACF617DF6689C6A08A06AF96B36" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2B779C3279EF2F9718B608A06AF663F7" xlink:to="loc_dei_LegalEntityAxis_FA12CACF617DF6689C6A08A06AF96B36" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_EF7EC9920742F884CDD908A06AF91B51_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_FA12CACF617DF6689C6A08A06AF96B36" xlink:to="loc_dei_EntityDomain_EF7EC9920742F884CDD908A06AF91B51_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_EF7EC9920742F884CDD908A06AF91B51" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_FA12CACF617DF6689C6A08A06AF96B36" xlink:to="loc_dei_EntityDomain_EF7EC9920742F884CDD908A06AF91B51" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_7B2550F27E50F03405CA08A06AFA2434" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_EF7EC9920742F884CDD908A06AF91B51" xlink:to="loc_evrg_WestarEnergyIncMember_7B2550F27E50F03405CA08A06AFA2434" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_842A4BED47D369AD392A08A06AFACDBA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_EF7EC9920742F884CDD908A06AF91B51" xlink:to="loc_evrg_KCPLMember_842A4BED47D369AD392A08A06AFACDBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_A7CBEB1CA27BBEA1A24D08A06AFA7A88" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2B779C3279EF2F9718B608A06AF663F7" xlink:to="loc_us-gaap_AwardTypeAxis_A7CBEB1CA27BBEA1A24D08A06AFA7A88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83E26A945225DFEC972308A06AFABD98_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_A7CBEB1CA27BBEA1A24D08A06AFA7A88" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83E26A945225DFEC972308A06AFABD98_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83E26A945225DFEC972308A06AFABD98" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_A7CBEB1CA27BBEA1A24D08A06AFA7A88" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83E26A945225DFEC972308A06AFABD98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_6270154FFD91D213834208A06AFBF4A0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83E26A945225DFEC972308A06AFABD98" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_6270154FFD91D213834208A06AFBF4A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="loc_us-gaap_PerformanceSharesMember_3D6EA62015377B20981508A06AFBD144" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83E26A945225DFEC972308A06AFABD98" xlink:to="loc_us-gaap_PerformanceSharesMember_3D6EA62015377B20981508A06AFBD144" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_EA949D22506ABFF3B12708A06AFB5116" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83E26A945225DFEC972308A06AFABD98" xlink:to="loc_us-gaap_RestrictedStockMember_EA949D22506ABFF3B12708A06AFB5116" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost_51BE454C1E7547AF5FA408A06AFB30FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost_51BE454C1E7547AF5FA408A06AFB30FB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessAcquisitionConversionRatio" xlink:label="loc_evrg_BusinessAcquisitionConversionRatio_4FCC3C1EA2FC4DDC0F5308A06AFC8105" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_evrg_BusinessAcquisitionConversionRatio_4FCC3C1EA2FC4DDC0F5308A06AFC8105" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_0C5732D0E74A9A15A1E608A06AFCF8AB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_0C5732D0E74A9A15A1E608A06AFCF8AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_3A6CDCB51D11667EC07608A06AFCEE49" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_3A6CDCB51D11667EC07608A06AFCEE49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_B0101DC5656A945B631E08A06AFC32F5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_B0101DC5656A945B631E08A06AFC32F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_B64602CB3CF25068955808A06AFC5514" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_B64602CB3CF25068955808A06AFC5514" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_AFABD6FCBC8396DDB8E208A06AFDB06B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_AFABD6FCBC8396DDB8E208A06AFDB06B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_5A0EEAF979B01462FA8A08A06AFDE56D" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_5A0EEAF979B01462FA8A08A06AFDE56D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_6F6450485594F8A709D808A06AFDD5D0" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_6F6450485594F8A709D808A06AFDD5D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_F0B2B18358E513F9BBE108A06AFD9EE2" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_F0B2B18358E513F9BBE108A06AFD9EE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_A44AEFF98B305B99FCF108A06AFDFE64" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_A44AEFF98B305B99FCF108A06AFDFE64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_B2F6E3A362399456B95C08A06AFD1761" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_A44AEFF98B305B99FCF108A06AFDFE64" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_B2F6E3A362399456B95C08A06AFD1761" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_DA64C8997EE5C1C66DFE08A06AFE365F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_A44AEFF98B305B99FCF108A06AFDFE64" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_DA64C8997EE5C1C66DFE08A06AFE365F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAddedfromMerger" xlink:label="loc_evrg_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAddedfromMerger_CC51F80017B04E96E5E608A06AFE5F69" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_A44AEFF98B305B99FCF108A06AFDFE64" xlink:to="loc_evrg_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAddedfromMerger_CC51F80017B04E96E5E608A06AFE5F69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_D7B162A9B8DB71E05A9108A06AFE5E03" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_A44AEFF98B305B99FCF108A06AFDFE64" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_D7B162A9B8DB71E05A9108A06AFE5E03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_20AFBA23D2024BA5D22208A06AFE0366" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_A44AEFF98B305B99FCF108A06AFDFE64" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_20AFBA23D2024BA5D22208A06AFE0366" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_71462DE1C12F7EC7B26D08A06AFF35D4" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_71462DE1C12F7EC7B26D08A06AFF35D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_77A58DC7A866D397F01108A06AFFA06E" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_77A58DC7A866D397F01108A06AFFA06E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAddedfromMergerWeightedAverageGrantDateFairValue" xlink:label="loc_evrg_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAddedfromMergerWeightedAverageGrantDateFairValue_F8D62D50BA3CC750BB7A08A06AFF22BA" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_evrg_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAddedfromMergerWeightedAverageGrantDateFairValue_F8D62D50BA3CC750BB7A08A06AFF22BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_C125AED39DF963F63C6808A06AFFF65C" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_C125AED39DF963F63C6808A06AFFF65C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_8CADE12B4CD60F064DB508A06AFF52E8" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_8CADE12B4CD60F064DB508A06AFF52E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_50425CF2709D61896D8908A06B0068C9" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_50425CF2709D61896D8908A06B0068C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_7F839A2CAFBF0D0D025408A06B000CBD" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_7F839A2CAFBF0D0D025408A06B000CBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_6F982533625799E6D4F508A06B0004BE" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_58B80E57B2BAF94B25E708A06AFB2105" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_6F982533625799E6D4F508A06B0004BE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/EquityCompensationTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/FairValueMeasurements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/FairValueMeasurementsDebtDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_8B603472B5F9EE92B9DD086DB470A6FA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F6F4F697044F6E158114086DB46A6E6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_8B603472B5F9EE92B9DD086DB470A6FA" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F6F4F697044F6E158114086DB46A6E6E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_DDEA1499C983F70DA2C3086DB46B1295" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F6F4F697044F6E158114086DB46A6E6E" xlink:to="loc_us-gaap_DebtInstrumentAxis_DDEA1499C983F70DA2C3086DB46B1295" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0F77254E62C241383DED086DB46B106D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_DDEA1499C983F70DA2C3086DB46B1295" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0F77254E62C241383DED086DB46B106D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0F77254E62C241383DED086DB46B106D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_DDEA1499C983F70DA2C3086DB46B1295" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0F77254E62C241383DED086DB46B106D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LongTermDebtFairValueAdjustmentMember" xlink:label="loc_evrg_LongTermDebtFairValueAdjustmentMember_10D3087CE722DE075D62086DB46BA8F4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0F77254E62C241383DED086DB46B106D" xlink:to="loc_evrg_LongTermDebtFairValueAdjustmentMember_10D3087CE722DE075D62086DB46BA8F4" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_743C729808205219D27E086DB46CEF46" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F6F4F697044F6E158114086DB46A6E6E" xlink:to="loc_dei_LegalEntityAxis_743C729808205219D27E086DB46CEF46" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F710E19AF5D0C86C4312086DB46C6205_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_743C729808205219D27E086DB46CEF46" xlink:to="loc_dei_EntityDomain_F710E19AF5D0C86C4312086DB46C6205_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F710E19AF5D0C86C4312086DB46C6205" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_743C729808205219D27E086DB46CEF46" xlink:to="loc_dei_EntityDomain_F710E19AF5D0C86C4312086DB46C6205" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_3F21C4EB755ED4F41B4D086DB46C2F80" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F710E19AF5D0C86C4312086DB46C6205" xlink:to="loc_evrg_WestarEnergyIncMember_3F21C4EB755ED4F41B4D086DB46C2F80" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_CE105F76AB0476A84AD8086DB46C8509" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F710E19AF5D0C86C4312086DB46C6205" xlink:to="loc_evrg_KCPLMember_CE105F76AB0476A84AD8086DB46C8509" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_16D792DDD1A02465787B086DB46CB56C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F6F4F697044F6E158114086DB46A6E6E" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_16D792DDD1A02465787B086DB46CB56C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_DF985DA93185DE23BD08086DB46D367F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_16D792DDD1A02465787B086DB46CB56C" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_DF985DA93185DE23BD08086DB46D367F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_65967E3BA8C8C6ECA621086DB46D8F27" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_16D792DDD1A02465787B086DB46CB56C" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_65967E3BA8C8C6ECA621086DB46D8F27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_DF985DA93185DE23BD08086DB46D367F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_65967E3BA8C8C6ECA621086DB46D8F27" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_DF985DA93185DE23BD08086DB46D367F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_4EF13233C82EFF50A723086DB46D44B7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_DF985DA93185DE23BD08086DB46D367F" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_4EF13233C82EFF50A723086DB46D44B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_C64995A332E76B57D866086DB46E8F80" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_DF985DA93185DE23BD08086DB46D367F" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_C64995A332E76B57D866086DB46E8F80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ChangeDuringPeriodFairValueDisclosureMember" xlink:label="loc_us-gaap_ChangeDuringPeriodFairValueDisclosureMember_53966D0823833B3C19ED086DB46E34CB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_DF985DA93185DE23BD08086DB46D367F" xlink:to="loc_us-gaap_ChangeDuringPeriodFairValueDisclosureMember_53966D0823833B3C19ED086DB46E34CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_CB14592D1CC866308CA4086DB46E82BB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F6F4F697044F6E158114086DB46A6E6E" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_CB14592D1CC866308CA4086DB46E82BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_AD806533E5FFE892F7D5086DB46EC0F4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_CB14592D1CC866308CA4086DB46E82BB" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_AD806533E5FFE892F7D5086DB46EC0F4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_AD806533E5FFE892F7D5086DB46EC0F4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_CB14592D1CC866308CA4086DB46E82BB" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_AD806533E5FFE892F7D5086DB46EC0F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_1E10BE973591C3258D15086DB46E2B4C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_AD806533E5FFE892F7D5086DB46EC0F4" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_1E10BE973591C3258D15086DB46E2B4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4598959348A400A96849086DB46FCF33" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F6F4F697044F6E158114086DB46A6E6E" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4598959348A400A96849086DB46FCF33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BBC62C4F2F4ACAEC74B3086DB46FD9E2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4598959348A400A96849086DB46FCF33" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BBC62C4F2F4ACAEC74B3086DB46FD9E2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BBC62C4F2F4ACAEC74B3086DB46FD9E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_4598959348A400A96849086DB46FCF33" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BBC62C4F2F4ACAEC74B3086DB46FD9E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_B88326F786917E5420A9086DB46F3141" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BBC62C4F2F4ACAEC74B3086DB46FD9E2" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_B88326F786917E5420A9086DB46F3141" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_D4F3CFC8E80154C36FAE086DB46F0E62" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F6F4F697044F6E158114086DB46A6E6E" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_D4F3CFC8E80154C36FAE086DB46F0E62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_C7F2D253DDCD95A89751086DB470F0FC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_D4F3CFC8E80154C36FAE086DB46F0E62" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_C7F2D253DDCD95A89751086DB470F0FC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_C7F2D253DDCD95A89751086DB470F0FC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_D4F3CFC8E80154C36FAE086DB46F0E62" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_C7F2D253DDCD95A89751086DB470F0FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_D4BDF72EADEA97653655086DB4709DEE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_C7F2D253DDCD95A89751086DB470F0FC" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_D4BDF72EADEA97653655086DB4709DEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_BBE67C081D6B70AF0162086DB470767D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_8B603472B5F9EE92B9DD086DB470A6FA" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_BBE67C081D6B70AF0162086DB470767D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_F450E396591236B58433086DB471F56B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_8B603472B5F9EE92B9DD086DB470A6FA" xlink:to="loc_invest_DerivativeNotionalAmount_F450E396591236B58433086DB471F56B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessAcquisitionFairValueAdjustmentLongTermDebt" xlink:label="loc_evrg_BusinessAcquisitionFairValueAdjustmentLongTermDebt_88A14B2F401C2E507F2F086DB4718A59" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_8B603472B5F9EE92B9DD086DB470A6FA" xlink:to="loc_evrg_BusinessAcquisitionFairValueAdjustmentLongTermDebt_88A14B2F401C2E507F2F086DB4718A59" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:label="loc_us-gaap_LongTermDebtFairValue_CDF9C3230F33A14630DF086DB4715075" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_8B603472B5F9EE92B9DD086DB470A6FA" xlink:to="loc_us-gaap_LongTermDebtFairValue_CDF9C3230F33A14630DF086DB4715075" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeNet" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_15F4F948E2320EDFB444086DB4717546" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_8B603472B5F9EE92B9DD086DB470A6FA" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_15F4F948E2320EDFB444086DB4717546" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_C49FB8CA50FE0B01686F086DB4710D08" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_8B603472B5F9EE92B9DD086DB470A6FA" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_C49FB8CA50FE0B01686F086DB4710D08" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/FairValueMeasurementsGainLossDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract" xlink:label="loc_us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_6670F62C9EC55F17F1FAEC8D4B832403" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsTable" xlink:label="loc_us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_06F5447A83A3E52DF639EC8D4B7CCDD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_6670F62C9EC55F17F1FAEC8D4B832403" xlink:to="loc_us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_06F5447A83A3E52DF639EC8D4B7CCDD2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_100207D9C0657694ADCAEC8D4B7C3C06" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_06F5447A83A3E52DF639EC8D4B7CCDD2" xlink:to="loc_dei_LegalEntityAxis_100207D9C0657694ADCAEC8D4B7C3C06" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_7B12A572B5A82DFF803AEC8D4B7C1517_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_100207D9C0657694ADCAEC8D4B7C3C06" xlink:to="loc_dei_EntityDomain_7B12A572B5A82DFF803AEC8D4B7C1517_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_7B12A572B5A82DFF803AEC8D4B7C1517" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_100207D9C0657694ADCAEC8D4B7C3C06" xlink:to="loc_dei_EntityDomain_7B12A572B5A82DFF803AEC8D4B7C1517" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_9982249DC3F867E18B9FEC8D4B7DBCE5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7B12A572B5A82DFF803AEC8D4B7C1517" xlink:to="loc_evrg_WestarEnergyIncMember_9982249DC3F867E18B9FEC8D4B7DBCE5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_7B1A3146DFE3C24F0E61EC8D4B7DC6E4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7B12A572B5A82DFF803AEC8D4B7C1517" xlink:to="loc_evrg_KCPLMember_7B1A3146DFE3C24F0E61EC8D4B7DC6E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_74B3D0A94AFEF8EAFAEBEC8D4B822BF6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsTable_06F5447A83A3E52DF639EC8D4B7CCDD2" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_74B3D0A94AFEF8EAFAEBEC8D4B822BF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_A00D2276E36AA9DB20EDEC8D4B824935_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_74B3D0A94AFEF8EAFAEBEC8D4B822BF6" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_A00D2276E36AA9DB20EDEC8D4B824935_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_A00D2276E36AA9DB20EDEC8D4B824935" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_74B3D0A94AFEF8EAFAEBEC8D4B822BF6" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_A00D2276E36AA9DB20EDEC8D4B824935" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DecommissioningTrustAssetsEquityMember" xlink:label="loc_evrg_DecommissioningTrustAssetsEquityMember_31412D8025DFA733E60EEC8D4B83605E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_A00D2276E36AA9DB20EDEC8D4B824935" xlink:to="loc_evrg_DecommissioningTrustAssetsEquityMember_31412D8025DFA733E60EEC8D4B83605E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RabbiTrustsMember" xlink:label="loc_evrg_RabbiTrustsMember_F0F727DEB125698A4D84EC8D4B835BF0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_A00D2276E36AA9DB20EDEC8D4B824935" xlink:to="loc_evrg_RabbiTrustsMember_F0F727DEB125698A4D84EC8D4B835BF0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DecommissioningTrustAssetsDebtMember" xlink:label="loc_evrg_DecommissioningTrustAssetsDebtMember_30A5C4C2F53F93665164EC8D4B831058" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_A00D2276E36AA9DB20EDEC8D4B824935" xlink:to="loc_evrg_DecommissioningTrustAssetsDebtMember_30A5C4C2F53F93665164EC8D4B831058" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_8F026659A47EA22DECBBEC8D4B8437D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_6670F62C9EC55F17F1FAEC8D4B832403" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_8F026659A47EA22DECBBEC8D4B8437D5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/FairValueMeasurementsNavDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_84D4A37C6518051797AFF2EBD7DF9B83" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_84D4A37C6518051797AFF2EBD7DF9B83" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_EBE45EE32871671C9F95F2EBD7DFAD48" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_84D4A37C6518051797AFF2EBD7DF9B83" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_EBE45EE32871671C9F95F2EBD7DFAD48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7F12C8073CBED0133D27F2EBD7DF3E1E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_EBE45EE32871671C9F95F2EBD7DFAD48" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7F12C8073CBED0133D27F2EBD7DF3E1E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7F12C8073CBED0133D27F2EBD7DF3E1E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_EBE45EE32871671C9F95F2EBD7DFAD48" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7F12C8073CBED0133D27F2EBD7DF3E1E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_2E9A13397D4DBA5ADEF0F2EBD7DF55C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7F12C8073CBED0133D27F2EBD7DF3E1E" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_2E9A13397D4DBA5ADEF0F2EBD7DF55C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_74F0D8659F0F88775370F2EBD7DF2B56" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_84D4A37C6518051797AFF2EBD7DF9B83" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_74F0D8659F0F88775370F2EBD7DF2B56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_982557A572D2FE745227F2EBD7DFB09B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_74F0D8659F0F88775370F2EBD7DF2B56" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_982557A572D2FE745227F2EBD7DFB09B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_982557A572D2FE745227F2EBD7DFB09B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_74F0D8659F0F88775370F2EBD7DF2B56" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_982557A572D2FE745227F2EBD7DFB09B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_B3D174284B92168D75DCF2EBD7DFD31D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_982557A572D2FE745227F2EBD7DFB09B" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_B3D174284B92168D75DCF2EBD7DFD31D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionAxis" xlink:label="loc_us-gaap_GeographicDistributionAxis_E7CC4A5A303C93DB7269F2EBD7DF1048" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_84D4A37C6518051797AFF2EBD7DF9B83" xlink:to="loc_us-gaap_GeographicDistributionAxis_E7CC4A5A303C93DB7269F2EBD7DF1048" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionDomain" xlink:label="loc_us-gaap_GeographicDistributionDomain_0CD95398136F53E934B6F2EBD7DF08F9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GeographicDistributionAxis_E7CC4A5A303C93DB7269F2EBD7DF1048" xlink:to="loc_us-gaap_GeographicDistributionDomain_0CD95398136F53E934B6F2EBD7DF08F9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionDomain" xlink:label="loc_us-gaap_GeographicDistributionDomain_0CD95398136F53E934B6F2EBD7DF08F9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GeographicDistributionAxis_E7CC4A5A303C93DB7269F2EBD7DF1048" xlink:to="loc_us-gaap_GeographicDistributionDomain_0CD95398136F53E934B6F2EBD7DF08F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionDomesticMember" xlink:label="loc_us-gaap_GeographicDistributionDomesticMember_A517D2CFEE15771B312EF2EBD7DF4251" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_0CD95398136F53E934B6F2EBD7DF08F9" xlink:to="loc_us-gaap_GeographicDistributionDomesticMember_A517D2CFEE15771B312EF2EBD7DF4251" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_977E4F7840148835F697F2EBD7E303D6" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_84D4A37C6518051797AFF2EBD7DF9B83" xlink:to="loc_dei_LegalEntityAxis_977E4F7840148835F697F2EBD7E303D6" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_4BF4FAC99295AAD31922F2EBD7E3D656_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_977E4F7840148835F697F2EBD7E303D6" xlink:to="loc_dei_EntityDomain_4BF4FAC99295AAD31922F2EBD7E3D656_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_4BF4FAC99295AAD31922F2EBD7E3D656" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_977E4F7840148835F697F2EBD7E303D6" xlink:to="loc_dei_EntityDomain_4BF4FAC99295AAD31922F2EBD7E3D656" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_4AB342BEC5544D002EF5F2EBD7E32DF1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4BF4FAC99295AAD31922F2EBD7E3D656" xlink:to="loc_evrg_WestarEnergyIncMember_4AB342BEC5544D002EF5F2EBD7E32DF1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherEvergyMember" xlink:label="loc_evrg_OtherEvergyMember_557333BD34AC600BA45BF2EBD7E3390B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4BF4FAC99295AAD31922F2EBD7E3D656" xlink:to="loc_evrg_OtherEvergyMember_557333BD34AC600BA45BF2EBD7E3390B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_BFD258D822193D2230FCF2EBD7E4F52A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_84D4A37C6518051797AFF2EBD7DF9B83" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_BFD258D822193D2230FCF2EBD7E4F52A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_6233CE2396539EA111F7F2EBD7E4E1F3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_BFD258D822193D2230FCF2EBD7E4F52A" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_6233CE2396539EA111F7F2EBD7E4E1F3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_6233CE2396539EA111F7F2EBD7E4E1F3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_BFD258D822193D2230FCF2EBD7E4F52A" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_6233CE2396539EA111F7F2EBD7E4E1F3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DecommissioningTrustAssetsMember" xlink:label="loc_evrg_DecommissioningTrustAssetsMember_2860AB93810CBCEFC4FEF2EBD7E455C0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_6233CE2396539EA111F7F2EBD7E4E1F3" xlink:to="loc_evrg_DecommissioningTrustAssetsMember_2860AB93810CBCEFC4FEF2EBD7E455C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_5176707D0518E25EC19EF2EBD7E4C6FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DecommissioningTrustAssetsMember_2860AB93810CBCEFC4FEF2EBD7E455C0" xlink:to="loc_us-gaap_EquitySecuritiesMember_5176707D0518E25EC19EF2EBD7E4C6FB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EquitySecuritiesFourthFundMember" xlink:label="loc_evrg_EquitySecuritiesFourthFundMember_43E7862FC31A0CE25E71F2EBD7E42BAA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesMember_5176707D0518E25EC19EF2EBD7E4C6FB" xlink:to="loc_evrg_EquitySecuritiesFourthFundMember_43E7862FC31A0CE25E71F2EBD7E42BAA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EquitySecuritiesFifthFundMember" xlink:label="loc_evrg_EquitySecuritiesFifthFundMember_4FFB16EF6578B2B31C91F2EBD7E4A935" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesMember_5176707D0518E25EC19EF2EBD7E4C6FB" xlink:to="loc_evrg_EquitySecuritiesFifthFundMember_4FFB16EF6578B2B31C91F2EBD7E4A935" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AlternativeInvestmentFundMember" xlink:label="loc_evrg_AlternativeInvestmentFundMember_4218A33D7555B148B1AEF2EBD7E44227" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DecommissioningTrustAssetsMember_2860AB93810CBCEFC4FEF2EBD7E455C0" xlink:to="loc_evrg_AlternativeInvestmentFundMember_4218A33D7555B148B1AEF2EBD7E44227" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateFundsMember" xlink:label="loc_us-gaap_RealEstateFundsMember_46C734A146CA145C57B1F2EBD7E419EA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_DecommissioningTrustAssetsMember_2860AB93810CBCEFC4FEF2EBD7E455C0" xlink:to="loc_us-gaap_RealEstateFundsMember_46C734A146CA145C57B1F2EBD7E419EA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_CoreBondFundMember" xlink:label="loc_evrg_CoreBondFundMember_08D09E31CF7FB2EBE1BFF2EBD7E4A29A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_6233CE2396539EA111F7F2EBD7E4E1F3" xlink:to="loc_evrg_CoreBondFundMember_08D09E31CF7FB2EBE1BFF2EBD7E4A29A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtEquityOtherFundMember" xlink:label="loc_evrg_DebtEquityOtherFundMember_DB50716E57534ED20C3DF2EBD7E4C733" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_6233CE2396539EA111F7F2EBD7E4E1F3" xlink:to="loc_evrg_DebtEquityOtherFundMember_DB50716E57534ED20C3DF2EBD7E4C733" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RabbiTrustsMember" xlink:label="loc_evrg_RabbiTrustsMember_1E25230D74C116352680F2EBD7E46596" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_6233CE2396539EA111F7F2EBD7E4E1F3" xlink:to="loc_evrg_RabbiTrustsMember_1E25230D74C116352680F2EBD7E46596" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DecommissioningTrustAssetsAmount" xlink:label="loc_us-gaap_DecommissioningTrustAssetsAmount_1143D3DC4B03E81D12E3F2EBD7E479C7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_us-gaap_DecommissioningTrustAssetsAmount_1143D3DC4B03E81D12E3F2EBD7E479C7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RabbiTrustFairValueDisclosure" xlink:label="loc_evrg_RabbiTrustFairValueDisclosure_62EA9B65A2A329CACEAFF2EBD7E45D8D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_evrg_RabbiTrustFairValueDisclosure_62EA9B65A2A329CACEAFF2EBD7E45D8D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SelfInsuredHealthPlanTrustFairValueDisclosure" xlink:label="loc_evrg_SelfInsuredHealthPlanTrustFairValueDisclosure_A935CF54F8D9DAAF4F21F2EBD7E4A795" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_evrg_SelfInsuredHealthPlanTrustFairValueDisclosure_A935CF54F8D9DAAF4F21F2EBD7E4A795" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_B7735B131DB33130A07CF2EBD7E47633" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_B7735B131DB33130A07CF2EBD7E47633" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_C6F3889B461A9BD1FBF9F2EBD7E4037F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_C6F3889B461A9BD1FBF9F2EBD7E4037F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1_6DE4331A4B7F3FEDA903F2EBD7E45EFF" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1_6DE4331A4B7F3FEDA903F2EBD7E45EFF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfFunds" xlink:label="loc_evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfFunds_0399A83EA5E21EE6BF4DF2EBD7E4C1BA" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfFunds_0399A83EA5E21EE6BF4DF2EBD7E4C1BA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfFundsMakingDistributions" xlink:label="loc_evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfFundsMakingDistributions_0EEAEB6E51E2E51062C9F2EBD7E48949" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfFundsMakingDistributions_0EEAEB6E51E2E51062C9F2EBD7E48949" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareExtensionTerm" xlink:label="loc_evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareExtensionTerm_75D7DCEDEE91133AA995F2EBD7E45309" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareExtensionTerm_75D7DCEDEE91133AA995F2EBD7E45309" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfExtensions" xlink:label="loc_evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfExtensions_DCD6295EC12FB02B4970F2EBD7E89B09" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_C21DF7B2C8F349321920F2EBD7E429E6" xlink:to="loc_evrg_FairValueInvestmentsEntitiesthatCalculateNetAssetValuePerShareNumberOfExtensions_DCD6295EC12FB02B4970F2EBD7E89B09" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/FairValueMeasurementsRecurringDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7D679CB76AB9DD059555EC8D4C0E107B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3C84D66D51C81DEE106DEC8D4BFBA6DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7D679CB76AB9DD059555EC8D4C0E107B" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3C84D66D51C81DEE106DEC8D4BFBA6DD" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionAxis" xlink:label="loc_us-gaap_GeographicDistributionAxis_90B639AC4DC3A0DEBEA9EC8D4BFB7494" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3C84D66D51C81DEE106DEC8D4BFBA6DD" xlink:to="loc_us-gaap_GeographicDistributionAxis_90B639AC4DC3A0DEBEA9EC8D4BFB7494" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionDomain" xlink:label="loc_us-gaap_GeographicDistributionDomain_ACE65B01FF9E8586481DEC8D4BFC34B2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GeographicDistributionAxis_90B639AC4DC3A0DEBEA9EC8D4BFB7494" xlink:to="loc_us-gaap_GeographicDistributionDomain_ACE65B01FF9E8586481DEC8D4BFC34B2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionDomain" xlink:label="loc_us-gaap_GeographicDistributionDomain_ACE65B01FF9E8586481DEC8D4BFC34B2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GeographicDistributionAxis_90B639AC4DC3A0DEBEA9EC8D4BFB7494" xlink:to="loc_us-gaap_GeographicDistributionDomain_ACE65B01FF9E8586481DEC8D4BFC34B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionDomesticMember" xlink:label="loc_us-gaap_GeographicDistributionDomesticMember_983637B4C7FA839934AEEC8D4BFCAE09" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_ACE65B01FF9E8586481DEC8D4BFC34B2" xlink:to="loc_us-gaap_GeographicDistributionDomesticMember_983637B4C7FA839934AEEC8D4BFCAE09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicDistributionForeignMember" xlink:label="loc_us-gaap_GeographicDistributionForeignMember_0DF21D9D303D16E0CD0AEC8D4BFC7666" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_ACE65B01FF9E8586481DEC8D4BFC34B2" xlink:to="loc_us-gaap_GeographicDistributionForeignMember_0DF21D9D303D16E0CD0AEC8D4BFC7666" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_476DAB5A341CD0BAB859EC8D4BFCC13A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3C84D66D51C81DEE106DEC8D4BFBA6DD" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_476DAB5A341CD0BAB859EC8D4BFCC13A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_CD7F4D6EFFC76F7DEC3FEC8D4BFD32B5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_476DAB5A341CD0BAB859EC8D4BFCC13A" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_CD7F4D6EFFC76F7DEC3FEC8D4BFD32B5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_CD7F4D6EFFC76F7DEC3FEC8D4BFD32B5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_476DAB5A341CD0BAB859EC8D4BFCC13A" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_CD7F4D6EFFC76F7DEC3FEC8D4BFD32B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_AA9681D85206988DD2AAEC8D4BFDC872" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_CD7F4D6EFFC76F7DEC3FEC8D4BFD32B5" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_AA9681D85206988DD2AAEC8D4BFDC872" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_DEB5176278AFF3A616B7EC8D4BFD0E6C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3C84D66D51C81DEE106DEC8D4BFBA6DD" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_DEB5176278AFF3A616B7EC8D4BFD0E6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BF42FA8B54B7BC5D5E3AEC8D4BFD10EA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_DEB5176278AFF3A616B7EC8D4BFD0E6C" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BF42FA8B54B7BC5D5E3AEC8D4BFD10EA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BF42FA8B54B7BC5D5E3AEC8D4BFD10EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_DEB5176278AFF3A616B7EC8D4BFD0E6C" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BF42FA8B54B7BC5D5E3AEC8D4BFD10EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_5746B3D6E6FABEDA4E0EEC8D4BFE8407" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BF42FA8B54B7BC5D5E3AEC8D4BFD10EA" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_5746B3D6E6FABEDA4E0EEC8D4BFE8407" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_7E14A09498E56E30E48EEC8D4BFED5FB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BF42FA8B54B7BC5D5E3AEC8D4BFD10EA" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_7E14A09498E56E30E48EEC8D4BFED5FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_5B555B434B3925BD3CA4EC8D4C03B300" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BF42FA8B54B7BC5D5E3AEC8D4BFD10EA" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_5B555B434B3925BD3CA4EC8D4C03B300" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_01A83CE954F609AA8717EC8D4C033A78" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_BF42FA8B54B7BC5D5E3AEC8D4BFD10EA" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_01A83CE954F609AA8717EC8D4C033A78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_2A71304ABF8C874279F3EC8D4C04F291" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3C84D66D51C81DEE106DEC8D4BFBA6DD" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_2A71304ABF8C874279F3EC8D4C04F291" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_2A71304ABF8C874279F3EC8D4C04F291" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_2A71304ABF8C874279F3EC8D4C04F291" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_82376D238381C51F601DEC8D4C0407D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_us-gaap_EquitySecuritiesMember_82376D238381C51F601DEC8D4C0407D9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_CoreBondFundMember" xlink:label="loc_evrg_CoreBondFundMember_9CF8D2FE62915A57E3CBEC8D4C0438EC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_CoreBondFundMember_9CF8D2FE62915A57E3CBEC8D4C0438EC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_HighYieldBondFundMember" xlink:label="loc_evrg_HighYieldBondFundMember_75521685DD875607B1E7EC8D4C04591E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_HighYieldBondFundMember_75521685DD875607B1E7EC8D4C04591E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EmergingMarketsBondFundMember" xlink:label="loc_evrg_EmergingMarketsBondFundMember_A13D821434A712059CB1EC8D4C05DB1B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_EmergingMarketsBondFundMember_A13D821434A712059CB1EC8D4C05DB1B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtEquityOtherFundMember" xlink:label="loc_evrg_DebtEquityOtherFundMember_BA23C8BF069C64AADFE8EC8D4C054669" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_DebtEquityOtherFundMember_BA23C8BF069C64AADFE8EC8D4C054669" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AlternativeInvestmentFundMember" xlink:label="loc_evrg_AlternativeInvestmentFundMember_E52BC5BD442ED73DCBAFEC8D4C059236" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_AlternativeInvestmentFundMember_E52BC5BD442ED73DCBAFEC8D4C059236" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateFundsMember" xlink:label="loc_us-gaap_RealEstateFundsMember_641F9B513EE31E7FA00BEC8D4C057302" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_us-gaap_RealEstateFundsMember_641F9B513EE31E7FA00BEC8D4C057302" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesMember" xlink:label="loc_us-gaap_DebtSecuritiesMember_B2B7027CB225F492D25AEC8D4C05D534" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_us-gaap_DebtSecuritiesMember_B2B7027CB225F492D25AEC8D4C05D534" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_EF0A5C31F25A07A42898EC8D4C0618DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesMember_B2B7027CB225F492D25AEC8D4C05D534" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_EF0A5C31F25A07A42898EC8D4C0618DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_DDA8C8D4F6BC8972AAB3EC8D4C06C049" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesMember_B2B7027CB225F492D25AEC8D4C05D534" xlink:to="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_DDA8C8D4F6BC8972AAB3EC8D4C06C049" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_052C90F069F03E00E777EC8D4C0679A4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesMember_B2B7027CB225F492D25AEC8D4C05D534" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_052C90F069F03E00E777EC8D4C0679A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_878A6D29C0EDD04C5498EC8D4C066A75" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesMember_B2B7027CB225F492D25AEC8D4C05D534" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_878A6D29C0EDD04C5498EC8D4C066A75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_DD9546E64CD08B921041EC8D4C06B819" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesMember_B2B7027CB225F492D25AEC8D4C05D534" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_DD9546E64CD08B921041EC8D4C06B819" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashEquivalentsMember" xlink:label="loc_us-gaap_CashEquivalentsMember_485F55F7445A680F10C3EC8D4C0714A2" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_us-gaap_CashEquivalentsMember_485F55F7445A680F10C3EC8D4C0714A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_D0EA80BEAEC50725C402EC8D4C076BD4" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_D0EA80BEAEC50725C402EC8D4C076BD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommodityContractMember" xlink:label="loc_us-gaap_CommodityContractMember_6B5AD00E283EBBA92575EC8D4C0753A6" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_us-gaap_CommodityContractMember_6B5AD00E283EBBA92575EC8D4C0753A6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherTrustAssetsMember" xlink:label="loc_evrg_OtherTrustAssetsMember_AAB5B3F9DDF714B817B3EC8D4C07AA80" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_OtherTrustAssetsMember_AAB5B3F9DDF714B817B3EC8D4C07AA80" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DecommissioningTrustAssetsMember" xlink:label="loc_evrg_DecommissioningTrustAssetsMember_2A350538BD75E95BDEBBEC8D4C0706E0" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_DecommissioningTrustAssetsMember_2A350538BD75E95BDEBBEC8D4C0706E0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RabbiTrustsMember" xlink:label="loc_evrg_RabbiTrustsMember_BCF91D013F81C11C034BEC8D4C0719FC" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_RabbiTrustsMember_BCF91D013F81C11C034BEC8D4C0719FC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SelfInsuredHealthPlanTrustMember" xlink:label="loc_evrg_SelfInsuredHealthPlanTrustMember_C849207EBAEEFAD3EC41EC8D4C072696" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_35F5CC3359A6AFE8D66DEC8D4C0484B3" xlink:to="loc_evrg_SelfInsuredHealthPlanTrustMember_C849207EBAEEFAD3EC41EC8D4C072696" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_7D1E239F3CF590D52411EC8D4C08D5C6" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3C84D66D51C81DEE106DEC8D4BFBA6DD" xlink:to="loc_dei_LegalEntityAxis_7D1E239F3CF590D52411EC8D4C08D5C6" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_2CFCBB67F87EE0EA9389EC8D4C080B15_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7D1E239F3CF590D52411EC8D4C08D5C6" xlink:to="loc_dei_EntityDomain_2CFCBB67F87EE0EA9389EC8D4C080B15_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_2CFCBB67F87EE0EA9389EC8D4C080B15" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7D1E239F3CF590D52411EC8D4C08D5C6" xlink:to="loc_dei_EntityDomain_2CFCBB67F87EE0EA9389EC8D4C080B15" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_84A77CD6DFEFFB2B2F57EC8D4C08B26B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2CFCBB67F87EE0EA9389EC8D4C080B15" xlink:to="loc_evrg_WestarEnergyIncMember_84A77CD6DFEFFB2B2F57EC8D4C08B26B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_9EE8B88C92BBF3DDB57AEC8D4C080F9F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2CFCBB67F87EE0EA9389EC8D4C080B15" xlink:to="loc_evrg_KCPLMember_9EE8B88C92BBF3DDB57AEC8D4C080F9F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherEvergyMember" xlink:label="loc_evrg_OtherEvergyMember_354709F721083F1E952DEC8D4C093674" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2CFCBB67F87EE0EA9389EC8D4C080B15" xlink:to="loc_evrg_OtherEvergyMember_354709F721083F1E952DEC8D4C093674" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7D679CB76AB9DD059555EC8D4C0E107B" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DecommissioningTrustAssetsAmount" xlink:label="loc_us-gaap_DecommissioningTrustAssetsAmount_2A10E969263EE4696A4EEC8D4C0E83DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:to="loc_us-gaap_DecommissioningTrustAssetsAmount_2A10E969263EE4696A4EEC8D4C0E83DA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RabbiTrustFairValueDisclosure" xlink:label="loc_evrg_RabbiTrustFairValueDisclosure_3084990427CB4987B92FEC8D4C0F36AD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:to="loc_evrg_RabbiTrustFairValueDisclosure_3084990427CB4987B92FEC8D4C0F36AD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SelfInsuredHealthPlanTrustFairValueDisclosure" xlink:label="loc_evrg_SelfInsuredHealthPlanTrustFairValueDisclosure_15AB5D43615A2E5E360BEC8D4C0F912A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:to="loc_evrg_SelfInsuredHealthPlanTrustFairValueDisclosure_15AB5D43615A2E5E360BEC8D4C0F912A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_E02637227455B0C5DD4BEC8D4C0FD326" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_E02637227455B0C5DD4BEC8D4C0FD326" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:label="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_57A4A63ACE03B74672E3EC8D4C0F4CF0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:to="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_57A4A63ACE03B74672E3EC8D4C0F4CF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeNet" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_4A35D2D9FE14F07675CAEC8D4C0FF989" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_4A35D2D9FE14F07675CAEC8D4C0FF989" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_1DB0D18DE6811B808226EC8D4C0FB003" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1BE4093AC86257A7BEA4EC8D4C0ED57D" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_1DB0D18DE6811B808226EC8D4C0FB003" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount" xlink:label="loc_us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount_99055A602A6CE7EA78BBEC8D4C10B14D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7D679CB76AB9DD059555EC8D4C0E107B" xlink:to="loc_us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount_99055A602A6CE7EA78BBEC8D4C10B14D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FairValueAssetsLevel2ToAlternativeInvestmentsTransfersAmount" xlink:label="loc_evrg_FairValueAssetsLevel2ToAlternativeInvestmentsTransfersAmount_070725D5BC5B738ED5DCEC8D4C105541" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_7D679CB76AB9DD059555EC8D4C0E107B" xlink:to="loc_evrg_FairValueAssetsLevel2ToAlternativeInvestmentsTransfersAmount_070725D5BC5B738ED5DCEC8D4C105541" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/Guarantees" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/GuaranteesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="loc_us-gaap_GuaranteeObligationsLineItems_3AFBD2980DB9E897EA1BFD1810F858C7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:label="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_3CED72605F79C75BE63DFD1810F50978" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_3AFBD2980DB9E897EA1BFD1810F858C7" xlink:to="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_3CED72605F79C75BE63DFD1810F50978" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_E63D8D212719FAE859A8FD1810F5F965" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_3CED72605F79C75BE63DFD1810F50978" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_E63D8D212719FAE859A8FD1810F5F965" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_0CEDAB6FEB1269D92C84FD1810F63761_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_E63D8D212719FAE859A8FD1810F5F965" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_0CEDAB6FEB1269D92C84FD1810F63761_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_0CEDAB6FEB1269D92C84FD1810F63761" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_E63D8D212719FAE859A8FD1810F5F965" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_0CEDAB6FEB1269D92C84FD1810F63761" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialGuaranteeMember" xlink:label="loc_us-gaap_FinancialGuaranteeMember_B04B7FB4CE9D49B4EBA4FD1810F664EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_0CEDAB6FEB1269D92C84FD1810F63761" xlink:to="loc_us-gaap_FinancialGuaranteeMember_B04B7FB4CE9D49B4EBA4FD1810F664EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeOfIndebtednessOfOthersMember" xlink:label="loc_us-gaap_GuaranteeOfIndebtednessOfOthersMember_CDDD91EECA1CCCF30EA6FD1810F76396" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_0CEDAB6FEB1269D92C84FD1810F63761" xlink:to="loc_us-gaap_GuaranteeOfIndebtednessOfOthersMember_CDDD91EECA1CCCF30EA6FD1810F76396" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_6C35921FBDED002DB7B7FD1810F742ED" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_3CED72605F79C75BE63DFD1810F50978" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_6C35921FBDED002DB7B7FD1810F742ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_472A77E7656B9A76B79DFD1810F77E10_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_6C35921FBDED002DB7B7FD1810F742ED" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_472A77E7656B9A76B79DFD1810F77E10_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_472A77E7656B9A76B79DFD1810F77E10" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_6C35921FBDED002DB7B7FD1810F742ED" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_472A77E7656B9A76B79DFD1810F77E10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_2CA53EA8666D81669C98FD1810F78B13" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_472A77E7656B9A76B79DFD1810F77E10" xlink:to="loc_us-gaap_CommercialPaperMember_2CA53EA8666D81669C98FD1810F78B13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_48D320CA4A334EC4ABD6FD1810F712D0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_3CED72605F79C75BE63DFD1810F50978" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_48D320CA4A334EC4ABD6FD1810F712D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_959BA74EAA386BE74123FD1810F8ECCA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_48D320CA4A334EC4ABD6FD1810F712D0" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_959BA74EAA386BE74123FD1810F8ECCA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_959BA74EAA386BE74123FD1810F8ECCA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_48D320CA4A334EC4ABD6FD1810F712D0" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_959BA74EAA386BE74123FD1810F8ECCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMember" xlink:label="loc_us-gaap_LongTermDebtMember_58B6C36CFE812196EC34FD1810F8C78E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_959BA74EAA386BE74123FD1810F8ECCA" xlink:to="loc_us-gaap_LongTermDebtMember_58B6C36CFE812196EC34FD1810F8C78E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsOriginAndPurpose" xlink:label="loc_us-gaap_GuaranteeObligationsOriginAndPurpose_1CA2F8005ED26433B980FD1810F95723" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_3AFBD2980DB9E897EA1BFD1810F858C7" xlink:to="loc_us-gaap_GuaranteeObligationsOriginAndPurpose_1CA2F8005ED26433B980FD1810F95723" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_E38C87603AC5DD3B0C15FD1810F948BB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_3AFBD2980DB9E897EA1BFD1810F858C7" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_E38C87603AC5DD3B0C15FD1810F948BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GuaranteeObligationsTerm" xlink:label="loc_us-gaap_GuaranteeObligationsTerm_D9F64784FA978ADB09B4FD1810F91D42" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_3AFBD2980DB9E897EA1BFD1810F858C7" xlink:to="loc_us-gaap_GuaranteeObligationsTerm_D9F64784FA978ADB09B4FD1810F91D42" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/IncomeTaxExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_EAEF91DF287381C7AE8508A0699BE4BB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_6D293E09A1575B3B6C7408A06998FB19" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_EAEF91DF287381C7AE8508A0699BE4BB" xlink:to="loc_us-gaap_StatementTable_6D293E09A1575B3B6C7408A06998FB19" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_38AA0368B11D4B29C5FC08A0699945D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6D293E09A1575B3B6C7408A06998FB19" xlink:to="loc_dei_LegalEntityAxis_38AA0368B11D4B29C5FC08A0699945D5" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_52479913B9F942AEBCD708A06999A894_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_38AA0368B11D4B29C5FC08A0699945D5" xlink:to="loc_dei_EntityDomain_52479913B9F942AEBCD708A06999A894_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_52479913B9F942AEBCD708A06999A894" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_38AA0368B11D4B29C5FC08A0699945D5" xlink:to="loc_dei_EntityDomain_52479913B9F942AEBCD708A06999A894" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_41745B8ECC796F398F1808A0699980FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_52479913B9F942AEBCD708A06999A894" xlink:to="loc_evrg_KCPLMember_41745B8ECC796F398F1808A0699980FE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_FE80B33DA230A0DE9AF608A0699ABB96" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_52479913B9F942AEBCD708A06999A894" xlink:to="loc_evrg_WestarEnergyIncMember_FE80B33DA230A0DE9AF608A0699ABB96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_A68AEC8B5EDC393BA5D408A0699A602E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6D293E09A1575B3B6C7408A06998FB19" xlink:to="loc_srt_ConsolidatedEntitiesAxis_A68AEC8B5EDC393BA5D408A0699A602E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_5C2A0C8AA1355FA8010F08A0699AB87D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_A68AEC8B5EDC393BA5D408A0699A602E" xlink:to="loc_srt_ConsolidatedEntitiesDomain_5C2A0C8AA1355FA8010F08A0699AB87D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_5C2A0C8AA1355FA8010F08A0699AB87D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_A68AEC8B5EDC393BA5D408A0699A602E" xlink:to="loc_srt_ConsolidatedEntitiesDomain_5C2A0C8AA1355FA8010F08A0699AB87D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_1ABD78D5B760B8B6148408A0699B5524" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_EAEF91DF287381C7AE8508A0699BE4BB" xlink:to="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_1ABD78D5B760B8B6148408A0699B5524" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_4992EB18FDE8AFFC937108A0699B2593" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_1ABD78D5B760B8B6148408A0699B5524" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_4992EB18FDE8AFFC937108A0699B2593" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_3FF4A8DB320DA46F71B808A0699B1117" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_4992EB18FDE8AFFC937108A0699B2593" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_3FF4A8DB320DA46F71B808A0699B1117" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_FF231854CA4CBDA8251D08A0699C3582" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_4992EB18FDE8AFFC937108A0699B2593" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_FF231854CA4CBDA8251D08A0699C3582" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_DCAF6D3B0A7FAB8DF37B08A0699C257B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_4992EB18FDE8AFFC937108A0699B2593" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_DCAF6D3B0A7FAB8DF37B08A0699C257B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_070A21ECE9B6A4E1179508A0699C278F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_1ABD78D5B760B8B6148408A0699B5524" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_070A21ECE9B6A4E1179508A0699C278F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_0DAAFD92ACA220D459F208A0699CDFA8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_070A21ECE9B6A4E1179508A0699C278F" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_0DAAFD92ACA220D459F208A0699CDFA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_E43034F98A6D809FD02608A0699CF231" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_070A21ECE9B6A4E1179508A0699C278F" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_E43034F98A6D809FD02608A0699CF231" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_73EBAB1853A62C657F9108A0699D6F99" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_070A21ECE9B6A4E1179508A0699C278F" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_73EBAB1853A62C657F9108A0699D6F99" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InvestmentTaxCreditAbstract" xlink:label="loc_evrg_InvestmentTaxCreditAbstract_DBC045FC7E76FEE7F9F808A0699DBE97" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_1ABD78D5B760B8B6148408A0699B5524" xlink:to="loc_evrg_InvestmentTaxCreditAbstract_DBC045FC7E76FEE7F9F808A0699DBE97" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InvestmentTaxCreditAmortization" xlink:label="loc_evrg_InvestmentTaxCreditAmortization_B687AF78C51CD80DB31A08A0699D69D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentTaxCreditAbstract_DBC045FC7E76FEE7F9F808A0699DBE97" xlink:to="loc_evrg_InvestmentTaxCreditAmortization_B687AF78C51CD80DB31A08A0699D69D4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InvestmentTaxCreditTotal" xlink:label="loc_evrg_InvestmentTaxCreditTotal_362CBF711B173D2CACA008A0699D606D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentTaxCreditAbstract_DBC045FC7E76FEE7F9F808A0699DBE97" xlink:to="loc_evrg_InvestmentTaxCreditTotal_362CBF711B173D2CACA008A0699D606D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_AA0F1A1A8BA30D397EE708A0699D0EF2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_1ABD78D5B760B8B6148408A0699B5524" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_AA0F1A1A8BA30D397EE708A0699D0EF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_EAEF91DF287381C7AE8508A0699BE4BB" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_720A574F50111F24D31508A0699EEE64" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_720A574F50111F24D31508A0699EEE64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance_1D22D17B2625F48FF3F808A0699E3F7C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance_1D22D17B2625F48FF3F808A0699E3F7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_211A68326C581E4A545208A0699E30E9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_211A68326C581E4A545208A0699E30E9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EffectiveIncomeTaxRateReconciliationEffectOfRegulatoryTreatmentBookTaxDifferences" xlink:label="loc_evrg_EffectiveIncomeTaxRateReconciliationEffectOfRegulatoryTreatmentBookTaxDifferences_55FC777630B7A230864408A0699E63D1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_evrg_EffectiveIncomeTaxRateReconciliationEffectOfRegulatoryTreatmentBookTaxDifferences_55FC777630B7A230864408A0699E63D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_FBABDB5B23E3E0919D8508A0699F1CC3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_FBABDB5B23E3E0919D8508A0699F1CC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense_3619EBADDDCB4DD3D82B08A0699F0CE3" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense_3619EBADDDCB4DD3D82B08A0699F0CE3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EffectiveIncomeTaxRateReconciliationAFUDCEquity" xlink:label="loc_evrg_EffectiveIncomeTaxRateReconciliationAFUDCEquity_DF6A4291A4A1ECFAEA3008A0699F39E3" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_evrg_EffectiveIncomeTaxRateReconciliationAFUDCEquity_DF6A4291A4A1ECFAEA3008A0699F39E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment_85E372F0CFA73679399F08A0699F06D4" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment_85E372F0CFA73679399F08A0699F06D4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ChangesInUncertainTaxPositionsNet" xlink:label="loc_evrg_ChangesInUncertainTaxPositionsNet_17F3CC58845437144AAA08A069A0310F" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_evrg_ChangesInUncertainTaxPositionsNet_17F3CC58845437144AAA08A069A0310F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_BF56F31E9639BA992FC508A069A0F5F7" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_BF56F31E9639BA992FC508A069A0F5F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_4BB035D51EA33B14F4FD08A069A02718" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_4BB035D51EA33B14F4FD08A069A02718" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_74ABDE7C0E902799A59208A069A0EC81" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_74ABDE7C0E902799A59208A069A0EC81" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OfficerCompensationLimitation" xlink:label="loc_evrg_OfficerCompensationLimitation_9C2E048EFFFD531C0B6E08A069A0FC55" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_evrg_OfficerCompensationLimitation_9C2E048EFFFD531C0B6E08A069A0FC55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_5D4406B2507073D49D2308A069A07C98" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_5D4406B2507073D49D2308A069A07C98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_C17780326DBD86163C6508A069A103AD" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BF40A3A268117AB91B1708A0699E647C" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_C17780326DBD86163C6508A069A103AD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/JointlyOwnedElectricUtilityPlants" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/JointlyOwnedElectricUtilityPlantsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsLineItems" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantInterestsTable" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantInterestsTable_808929563727B482DBFBF745AA536323" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantInterestsTable_808929563727B482DBFBF745AA536323" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_7CF618E3D21514FD3B21F745AA5490E4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsTable_808929563727B482DBFBF745AA536323" xlink:to="loc_dei_LegalEntityAxis_7CF618E3D21514FD3B21F745AA5490E4" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_922FCF375D8F48B507E0F745AA545312_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7CF618E3D21514FD3B21F745AA5490E4" xlink:to="loc_dei_EntityDomain_922FCF375D8F48B507E0F745AA545312_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_922FCF375D8F48B507E0F745AA545312" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7CF618E3D21514FD3B21F745AA5490E4" xlink:to="loc_dei_EntityDomain_922FCF375D8F48B507E0F745AA545312" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_E6B2C3134E25928C2689F745AA548C47" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_922FCF375D8F48B507E0F745AA545312" xlink:to="loc_evrg_KCPLMember_E6B2C3134E25928C2689F745AA548C47" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_5889B21041E5E9D0973DF745AA55526A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_922FCF375D8F48B507E0F745AA545312" xlink:to="loc_evrg_WestarEnergyIncMember_5889B21041E5E9D0973DF745AA55526A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_CFB079A2B6BB48144A88F745AA55833E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsTable_808929563727B482DBFBF745AA536323" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_CFB079A2B6BB48144A88F745AA55833E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_0D1CF0B14CD9BF8FB6BAF745AA55C929_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_CFB079A2B6BB48144A88F745AA55833E" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_0D1CF0B14CD9BF8FB6BAF745AA55C929_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_0D1CF0B14CD9BF8FB6BAF745AA55C929" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_CFB079A2B6BB48144A88F745AA55833E" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_0D1CF0B14CD9BF8FB6BAF745AA55C929" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LaCygneUnit2Member" xlink:label="loc_evrg_LaCygneUnit2Member_144C36B01C39E9F902EDF745AA55AEA2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_0D1CF0B14CD9BF8FB6BAF745AA55C929" xlink:to="loc_evrg_LaCygneUnit2Member_144C36B01C39E9F902EDF745AA55AEA2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JeffreyEnergyCenterMember" xlink:label="loc_evrg_JeffreyEnergyCenterMember_72AFB37F73C2F393A85CF745AA566C3C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_0D1CF0B14CD9BF8FB6BAF745AA55C929" xlink:to="loc_evrg_JeffreyEnergyCenterMember_72AFB37F73C2F393A85CF745AA566C3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantAxis" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantAxis_A96DDE81CBFEA35C7381F745AA566948" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsTable_808929563727B482DBFBF745AA536323" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantAxis_A96DDE81CBFEA35C7381F745AA566948" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_A96DDE81CBFEA35C7381F745AA566948" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_A96DDE81CBFEA35C7381F745AA566948" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantIatanCommonMember" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanCommonMember_6C3BAEF51677D7D3EF20F745AA56EA26" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanCommonMember_6C3BAEF51677D7D3EF20F745AA56EA26" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantJeffreyEnergyCenterMember" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantJeffreyEnergyCenterMember_088FD8B6317081DBA6D9F745AA570B81" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantJeffreyEnergyCenterMember_088FD8B6317081DBA6D9F745AA570B81" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantIatanNo.2Member" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanNo.2Member_2F60C4C683565A25094CF745AA579602" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanNo.2Member_2F60C4C683565A25094CF745AA579602" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantIatanNo1Member" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanNo1Member_3A22CCAC06193EBA28BEF745AA573DCA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanNo1Member_3A22CCAC06193EBA28BEF745AA573DCA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantLaCygneStationMember" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantLaCygneStationMember_05C4C4D6865ED4BBEDC6F745AA576891" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantLaCygneStationMember_05C4C4D6865ED4BBEDC6F745AA576891" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedNuclearPowerPlantMember" xlink:label="loc_us-gaap_JointlyOwnedNuclearPowerPlantMember_8F80AB679E3440F2B282F745AA57C753" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:to="loc_us-gaap_JointlyOwnedNuclearPowerPlantMember_8F80AB679E3440F2B282F745AA57C753" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantStateLineMember" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantStateLineMember_DD5B74B24895CFA10969F745AA5822C8" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantStateLineMember_DD5B74B24895CFA10969F745AA5822C8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LaCygneUnit2Member" xlink:label="loc_evrg_LaCygneUnit2Member_39B39636E5B962CC7355F78091049A55" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_0B812EF3430FDC1F5BB4F745AA565845" xlink:to="loc_evrg_LaCygneUnit2Member_39B39636E5B962CC7355F78091049A55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_38942DB13DC952CB33F9F745AA587D69" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_38942DB13DC952CB33F9F745AA587D69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService_91734D69B7EA1D07D837F745AA5837C7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService_91734D69B7EA1D07D837F745AA5837C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation_EA7652D7399FA54F1CD6F745AA587B55" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation_EA7652D7399FA54F1CD6F745AA587B55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NuclearFuelNetOfAmortization" xlink:label="loc_us-gaap_NuclearFuelNetOfAmortization_9F0E43A0D7C594ADA523F745AA59AFAF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:to="loc_us-gaap_NuclearFuelNetOfAmortization_9F0E43A0D7C594ADA523F745AA59AFAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress_1F98744353DBB5C2A6EFF745AA59BF7A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress_1F98744353DBB5C2A6EFF745AA59BF7A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AccreditedCapacity" xlink:label="loc_evrg_AccreditedCapacity_D66A1AD00BCD678256CDF745AA594A54" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:to="loc_evrg_AccreditedCapacity_D66A1AD00BCD678256CDF745AA594A54" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LeaseholdInterestPercentage" xlink:label="loc_evrg_LeaseholdInterestPercentage_E08D2B7D6A63B2933E2FF77F0F9B3A2F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantInterestsLineItems_BAB0624B644C6D19BC53F745AA580516" xlink:to="loc_evrg_LeaseholdInterestPercentage_E08D2B7D6A63B2933E2FF77F0F9B3A2F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/JointlyOwnedElectricUtilityPlantsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/LongTermDebt" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/LongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_93DE28C02300144B96C6086DB4A27FBB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentTable_93DE28C02300144B96C6086DB4A27FBB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_C4496D6D926C62DD0703086DB4A2B7CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_93DE28C02300144B96C6086DB4A27FBB" xlink:to="loc_dei_LegalEntityAxis_C4496D6D926C62DD0703086DB4A2B7CC" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_9A5B15679036661AC4DE086DB4A2033E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_C4496D6D926C62DD0703086DB4A2B7CC" xlink:to="loc_dei_EntityDomain_9A5B15679036661AC4DE086DB4A2033E_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_9A5B15679036661AC4DE086DB4A2033E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_C4496D6D926C62DD0703086DB4A2B7CC" xlink:to="loc_dei_EntityDomain_9A5B15679036661AC4DE086DB4A2033E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_78CFCA90D251EE97B9A3086DB4A36253" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9A5B15679036661AC4DE086DB4A2033E" xlink:to="loc_evrg_WestarEnergyIncMember_78CFCA90D251EE97B9A3086DB4A36253" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasGasAndElectricCompanyMember" xlink:label="loc_evrg_KansasGasAndElectricCompanyMember_19A663B8365536F5CCA9086DB4A32C08" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9A5B15679036661AC4DE086DB4A2033E" xlink:to="loc_evrg_KansasGasAndElectricCompanyMember_19A663B8365536F5CCA9086DB4A32C08" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_FE4C4467F1663C0477F6086DB4A3AB76" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9A5B15679036661AC4DE086DB4A2033E" xlink:to="loc_evrg_KCPLMember_FE4C4467F1663C0477F6086DB4A3AB76" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_AE94B730B08EB0EF4729086DB4A31565" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9A5B15679036661AC4DE086DB4A2033E" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_AE94B730B08EB0EF4729086DB4A31565" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_F8816A6FDB0CAB5D9D5E086DB4A4406A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_93DE28C02300144B96C6086DB4A27FBB" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_F8816A6FDB0CAB5D9D5E086DB4A4406A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_6565AD89B7ED7D7F4DC5086DB4A49E55_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_F8816A6FDB0CAB5D9D5E086DB4A4406A" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_6565AD89B7ED7D7F4DC5086DB4A49E55_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_6565AD89B7ED7D7F4DC5086DB4A49E55" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_F8816A6FDB0CAB5D9D5E086DB4A4406A" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_6565AD89B7ED7D7F4DC5086DB4A49E55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_47C4CB8A46B23E9ECF4A086DB4A4778B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_6565AD89B7ED7D7F4DC5086DB4A49E55" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_47C4CB8A46B23E9ECF4A086DB4A4778B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_390FE69866837A4BA4D0086DB4A4E572" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_93DE28C02300144B96C6086DB4A27FBB" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_390FE69866837A4BA4D0086DB4A4E572" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_390FE69866837A4BA4D0086DB4A4E572" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_390FE69866837A4BA4D0086DB4A4E572" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_DC2A8128A6FCC5F5B767086DB4A553D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765" xlink:to="loc_us-gaap_SecuredDebtMember_DC2A8128A6FCC5F5B767086DB4A553D9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PollutionControlBondsMember" xlink:label="loc_evrg_PollutionControlBondsMember_C077A978E890E3C45E7C086DB4A56BC7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765" xlink:to="loc_evrg_PollutionControlBondsMember_C077A978E890E3C45E7C086DB4A56BC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="loc_us-gaap_SeniorNotesMember_420C2A5985EE21763C33086DB4A50042" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765" xlink:to="loc_us-gaap_SeniorNotesMember_420C2A5985EE21763C33086DB4A50042" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MediumTermNotesMember" xlink:label="loc_us-gaap_MediumTermNotesMember_849C17E2087605778D20086DB4A68CC4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765" xlink:to="loc_us-gaap_MediumTermNotesMember_849C17E2087605778D20086DB4A68CC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="loc_us-gaap_UnsecuredDebtMember_8DF2D18621B0FAF846B7086DB4A6A204" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765" xlink:to="loc_us-gaap_UnsecuredDebtMember_8DF2D18621B0FAF846B7086DB4A6A204" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_E828C3A691694578FFDE086DB4A68BDC" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_04FAC8A27A57B2D7F44B086DB4A5D765" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_E828C3A691694578FFDE086DB4A68BDC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_BBA3004970BC05557721086DB4A6AD4F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_93DE28C02300144B96C6086DB4A27FBB" xlink:to="loc_us-gaap_DebtInstrumentAxis_BBA3004970BC05557721086DB4A6AD4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_BBA3004970BC05557721086DB4A6AD4F" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_BBA3004970BC05557721086DB4A6AD4F" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2020WRMember" xlink:label="loc_evrg_MortgageBondsDue2020WRMember_B6AEE6048B936CCC6D6D086DB4A6B168" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2020WRMember_B6AEE6048B936CCC6D6D086DB4A6B168" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2025WRMember" xlink:label="loc_evrg_MortgageBondsDue2025WRMember_97B52052459AB52D5ED9086DB4A7C7C4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2025WRMember_97B52052459AB52D5ED9086DB4A7C7C4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2026WRMember" xlink:label="loc_evrg_MortgageBondsDue2026WRMember_2E0AB9236C58B9A593AB086DB4A77A52" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2026WRMember_2E0AB9236C58B9A593AB086DB4A77A52" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2027WRMember" xlink:label="loc_evrg_MortgageBondsDue2027WRMember_DB0ABDACE459B6EBCB0F086DB4A7C94B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2027WRMember_DB0ABDACE459B6EBCB0F086DB4A7C94B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2042WRMember" xlink:label="loc_evrg_MortgageBondsDue2042WRMember_C515EE16179DB637C07E086DB4A7232E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2042WRMember_C515EE16179DB637C07E086DB4A7232E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2043AWRMember" xlink:label="loc_evrg_MortgageBondsDue2043AWRMember_2B35BEDED12AFBC88C68086DB4A81F8E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2043AWRMember_2B35BEDED12AFBC88C68086DB4A81F8E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2043BWRMember" xlink:label="loc_evrg_MortgageBondsDue2043BWRMember_764F8C8F34F168C4FF94086DB4A8CAB8" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2043BWRMember_764F8C8F34F168C4FF94086DB4A8CAB8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2045WRMember" xlink:label="loc_evrg_MortgageBondsDue2045WRMember_73AC5F29861AD9DE05A9086DB4A8C7C2" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2045WRMember_73AC5F29861AD9DE05A9086DB4A8C7C2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2019KGEMember" xlink:label="loc_evrg_MortgageBondsDue2019KGEMember_0E628EB3FA392EF3B930086DB4A86203" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2019KGEMember_0E628EB3FA392EF3B930086DB4A86203" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2023KGEMember" xlink:label="loc_evrg_MortgageBondsDue2023KGEMember_40704CA81EB829ABBC1D086DB4A86E59" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2023KGEMember_40704CA81EB829ABBC1D086DB4A86E59" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2037KGEMember" xlink:label="loc_evrg_MortgageBondsDue2037KGEMember_2286E0019CFB029EE130086DB4A9FCDB" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2037KGEMember_2286E0019CFB029EE130086DB4A9FCDB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2038KGEMember" xlink:label="loc_evrg_MortgageBondsDue2038KGEMember_374186FEBF884B9055FE086DB4A99E9A" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2038KGEMember_374186FEBF884B9055FE086DB4A99E9A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MortgageBondsDue2044KGEMember" xlink:label="loc_evrg_MortgageBondsDue2044KGEMember_9B4AD3B7075A55E8C33B086DB4A9A1CF" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MortgageBondsDue2044KGEMember_9B4AD3B7075A55E8C33B086DB4A9A1CF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GeneralMortgageBondsEIRRDue2023Member" xlink:label="loc_evrg_GeneralMortgageBondsEIRRDue2023Member_8668B70C942C8588A063086DB4A98B9D" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_GeneralMortgageBondsEIRRDue2023Member_8668B70C942C8588A063086DB4A98B9D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GeneralMortgageBondsSeries2009Due2019Member" xlink:label="loc_evrg_GeneralMortgageBondsSeries2009Due2019Member_35504A8B043F2D249F64086DB4A9AB91" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_GeneralMortgageBondsSeries2009Due2019Member_35504A8B043F2D249F64086DB4A9AB91" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FirstMortgageBondsDueThrough2021Member" xlink:label="loc_evrg_FirstMortgageBondsDueThrough2021Member_FF3107865D743E0193D9086DB4A9A677" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_FirstMortgageBondsDueThrough2021Member_FF3107865D743E0193D9086DB4A9A677" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PollutionControlBondsDue2032AWRMember" xlink:label="loc_evrg_PollutionControlBondsDue2032AWRMember_5929E79F2C32F050A8E5086DB4AA3257" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_PollutionControlBondsDue2032AWRMember_5929E79F2C32F050A8E5086DB4AA3257" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PollutionControlBondsDue2032BWRMember" xlink:label="loc_evrg_PollutionControlBondsDue2032BWRMember_64FB14824D4C2325B60C086DB4AA73CB" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_PollutionControlBondsDue2032BWRMember_64FB14824D4C2325B60C086DB4AA73CB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PollutionControlBondsDue2027KGEMember" xlink:label="loc_evrg_PollutionControlBondsDue2027KGEMember_A81CEA9E64456629AE75086DB4AA34C9" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_PollutionControlBondsDue2027KGEMember_A81CEA9E64456629AE75086DB4AA34C9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PollutionControlBondsDue2031KGEMember" xlink:label="loc_evrg_PollutionControlBondsDue2031KGEMember_AA5E26ABF1F5231B73A1086DB4AAD102" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_PollutionControlBondsDue2031KGEMember_AA5E26ABF1F5231B73A1086DB4AAD102" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PollutionControlBondsDue2032AKGEMember" xlink:label="loc_evrg_PollutionControlBondsDue2032AKGEMember_36E15B7D07E4C534EA13086DB4ABB1B5" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_PollutionControlBondsDue2032AKGEMember_36E15B7D07E4C534EA13086DB4ABB1B5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PollutionControlBondsDue2032BKGEMember" xlink:label="loc_evrg_PollutionControlBondsDue2032BKGEMember_15EA0CCB187C64B4AD84086DB4AB594F" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_PollutionControlBondsDue2032BKGEMember_15EA0CCB187C64B4AD84086DB4AB594F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EIRRBondsSeries2007Aand2007Bdue2035Member" xlink:label="loc_evrg_EIRRBondsSeries2007Aand2007Bdue2035Member_28685E979B04F255ED30086DB4AB4F86" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_EIRRBondsSeries2007Aand2007Bdue2035Member_28685E979B04F255ED30086DB4AB4F86" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EirrBonds2875PercentSeries2008Member" xlink:label="loc_evrg_EirrBonds2875PercentSeries2008Member_8D76B787FAD0A2FDE159086DB4AB430B" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_EirrBonds2875PercentSeries2008Member_8D76B787FAD0A2FDE159086DB4AB430B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesDue2018KcplMember" xlink:label="loc_evrg_SeniorNotesDue2018KcplMember_E3564FED19440B6733D2086DB4AC4D66" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesDue2018KcplMember_E3564FED19440B6733D2086DB4AC4D66" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesDue2023KcplMember" xlink:label="loc_evrg_SeniorNotesDue2023KcplMember_77492A57E6CE3AB5B32C086DB4ACBCF4" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesDue2023KcplMember_77492A57E6CE3AB5B32C086DB4ACBCF4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesdue2025KCPLMember" xlink:label="loc_evrg_SeniorNotesdue2025KCPLMember_7C621CD9A0D7A0E926ED086DB4ACEFDC" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesdue2025KCPLMember_7C621CD9A0D7A0E926ED086DB4ACEFDC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesDue2035KcplMember" xlink:label="loc_evrg_SeniorNotesDue2035KcplMember_7FB528C8F6F70966B8FB086DB4ACBACE" xlink:type="locator" />
    <link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesDue2035KcplMember_7FB528C8F6F70966B8FB086DB4ACBACE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesDue2041KcplMember" xlink:label="loc_evrg_SeniorNotesDue2041KcplMember_7592853165DD0336F329086DB4AC1279" xlink:type="locator" />
    <link:definitionArc order="29" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesDue2041KcplMember_7592853165DD0336F329086DB4AC1279" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesDue2047KCPLMember" xlink:label="loc_evrg_SeniorNotesDue2047KCPLMember_72AFD08BCFFB04E81559086DB4AD996F" xlink:type="locator" />
    <link:definitionArc order="30" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesDue2047KCPLMember_72AFD08BCFFB04E81559086DB4AD996F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesDue2048KCPLMember" xlink:label="loc_evrg_SeniorNotesDue2048KCPLMember_A90D4164ECEA3EF639D6086DB4ADAAEB" xlink:type="locator" />
    <link:definitionArc order="31" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesDue2048KCPLMember_A90D4164ECEA3EF639D6086DB4ADAAEB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotes827PercentSeriesDue2021Member" xlink:label="loc_evrg_SeniorNotes827PercentSeriesDue2021Member_2EA5B50DD5186687B7FC086DB4AD0EF0" xlink:type="locator" />
    <link:definitionArc order="32" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotes827PercentSeriesDue2021Member_2EA5B50DD5186687B7FC086DB4AD0EF0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesSeriesAdue2025Member" xlink:label="loc_evrg_SeniorNotesSeriesAdue2025Member_26FDD57358EF0514852F086DB4ADE12B" xlink:type="locator" />
    <link:definitionArc order="33" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesSeriesAdue2025Member_26FDD57358EF0514852F086DB4ADE12B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesSeriesBdue2033Member" xlink:label="loc_evrg_SeniorNotesSeriesBdue2033Member_B6FCF5DEECBE3EB2F232086DB4AE343A" xlink:type="locator" />
    <link:definitionArc order="34" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesSeriesBdue2033Member_B6FCF5DEECBE3EB2F232086DB4AE343A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesSeriesCdue2043Member" xlink:label="loc_evrg_SeniorNotesSeriesCdue2043Member_931489000C5D97052F5A086DB4AECA20" xlink:type="locator" />
    <link:definitionArc order="35" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesSeriesCdue2043Member_931489000C5D97052F5A086DB4AECA20" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotesDue2021Member" xlink:label="loc_evrg_SeniorNotesDue2021Member_E741E43205E25741DE5C086DB4AEE4FE" xlink:type="locator" />
    <link:definitionArc order="36" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotesDue2021Member_E741E43205E25741DE5C086DB4AEE4FE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SeniorNotes5.292PercentSeriesDue2022Member" xlink:label="loc_evrg_SeniorNotes5.292PercentSeriesDue2022Member_D19A125A90BED9789159086DB4AE41F7" xlink:type="locator" />
    <link:definitionArc order="37" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_SeniorNotes5.292PercentSeriesDue2022Member_D19A125A90BED9789159086DB4AE41F7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MediumTermNotes733PercentSeriesDue2023Member" xlink:label="loc_evrg_MediumTermNotes733PercentSeriesDue2023Member_2ECF8BC3936FE86F39BC086DB4AEEB4D" xlink:type="locator" />
    <link:definitionArc order="38" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MediumTermNotes733PercentSeriesDue2023Member_2ECF8BC3936FE86F39BC086DB4AEEB4D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MediumTermNotes717PercentSeriesDue2023Member" xlink:label="loc_evrg_MediumTermNotes717PercentSeriesDue2023Member_674216A14D78848D9818086DB4AFE412" xlink:type="locator" />
    <link:definitionArc order="39" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_MediumTermNotes717PercentSeriesDue2023Member_674216A14D78848D9818086DB4AFE412" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GeneralMortgageBondsEirrSeries2007BDue2035Member" xlink:label="loc_evrg_GeneralMortgageBondsEirrSeries2007BDue2035Member_6CED0F8B76A1E3B865A0086DB4AF88ED" xlink:type="locator" />
    <link:definitionArc order="40" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_GeneralMortgageBondsEirrSeries2007BDue2035Member_6CED0F8B76A1E3B865A0086DB4AF88ED" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_UnsecuredDebtDue2021VIEMember" xlink:label="loc_evrg_UnsecuredDebtDue2021VIEMember_584B0D017360EC85180D086DB4AF6F61" xlink:type="locator" />
    <link:definitionArc order="41" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_UnsecuredDebtDue2021VIEMember_584B0D017360EC85180D086DB4AF6F61" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GeneralMortgagebondsEIRRseries2005Member" xlink:label="loc_evrg_GeneralMortgagebondsEIRRseries2005Member_5B8783F5FA09FEB50B45086DB4AF4F2C" xlink:type="locator" />
    <link:definitionArc order="42" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_GeneralMortgagebondsEIRRseries2005Member_5B8783F5FA09FEB50B45086DB4AF4F2C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LongTermDebtFairValueAdjustmentMember" xlink:label="loc_evrg_LongTermDebtFairValueAdjustmentMember_65A7F9480D5ED9BD33C1086DB4B076BD" xlink:type="locator" />
    <link:definitionArc order="43" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_673239FB5C46FFA692DE086DB4A6AAF0" xlink:to="loc_evrg_LongTermDebtFairValueAdjustmentMember_65A7F9480D5ED9BD33C1086DB4B076BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExtinguishmentOfDebtAmount" xlink:label="loc_us-gaap_ExtinguishmentOfDebtAmount_2445510230F192571905086DB4B05521" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_ExtinguishmentOfDebtAmount_2445510230F192571905086DB4B05521" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_11EB56B777B43848E89B086DB4B0518F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_11EB56B777B43848E89B086DB4B0518F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtInstrumentCarryingAmountRepurchasedandHeld" xlink:label="loc_evrg_DebtInstrumentCarryingAmountRepurchasedandHeld_025515D2E04DD29E290B086DB4B17968" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_DebtInstrumentCarryingAmountRepurchasedandHeld_025515D2E04DD29E290B086DB4B17968" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_ED2E239D715171FC758C086DB4B1167D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentMaturityDate_ED2E239D715171FC758C086DB4B1167D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentMaturityDateRangeStart1" xlink:label="loc_us-gaap_DebtInstrumentMaturityDateRangeStart1_AF19845EED4541754EC1086DB4B1E8F8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentMaturityDateRangeStart1_AF19845EED4541754EC1086DB4B1E8F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentMaturityDateRangeEnd1" xlink:label="loc_us-gaap_DebtInstrumentMaturityDateRangeEnd1_CD69E53001F06ECC470C086DB4B19C4C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentMaturityDateRangeEnd1_CD69E53001F06ECC470C086DB4B19C4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_D0802A33D738551261E4086DB4B23458" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_LongTermDebtCurrent_D0802A33D738551261E4086DB4B23458" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_DE3019820016719424C8086DB4B24FF3" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_DE3019820016719424C8086DB4B24FF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_1A8F1D30B9BC202BA828086DB4B23FEE" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_1A8F1D30B9BC202BA828086DB4B23FEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_44926EA5BA154922CEC0086DB4B282F1" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_44926EA5BA154922CEC0086DB4B282F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_A08DCCFB26F97B7317B9086DB4B3E87B" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_A08DCCFB26F97B7317B9086DB4B3E87B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:label="loc_us-gaap_LongtermDebtWeightedAverageInterestRate_53CAC9B7447CFEBCFDB3086DB4B32F7D" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_LongtermDebtWeightedAverageInterestRate_53CAC9B7447CFEBCFDB3086DB4B32F7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_BC208723DBB499F80FF0086DB4B34D52" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_BC208723DBB499F80FF0086DB4B34D52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_B9678DB9134B43E15C68086DB4B3FD99" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_B9678DB9134B43E15C68086DB4B3FD99" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_7E9925562DEC037B5924086DB4B3CEB9" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_7E9925562DEC037B5924086DB4B3CEB9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LineOfCreditFacilityMaximumBorrowingCapacityAsAmended" xlink:label="loc_evrg_LineOfCreditFacilityMaximumBorrowingCapacityAsAmended_9DBFD55215A27DBBCAEE086DB4B4FAD1" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_LineOfCreditFacilityMaximumBorrowingCapacityAsAmended_9DBFD55215A27DBBCAEE086DB4B4FAD1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtInstrumentOptionalRedemptionPricePercentage" xlink:label="loc_evrg_DebtInstrumentOptionalRedemptionPricePercentage_AA39A46A6F86965E360D086DB4B476DB" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_DebtInstrumentOptionalRedemptionPricePercentage_AA39A46A6F86965E360D086DB4B476DB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtInstrumentMandatoryRedemptionPricePercentage" xlink:label="loc_evrg_DebtInstrumentMandatoryRedemptionPricePercentage_2FD2D5E700AF426E427D086DB4B40517" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_DebtInstrumentMandatoryRedemptionPricePercentage_2FD2D5E700AF426E427D086DB4B40517" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_813BA3D604560A7B25EC086DB4B4D062" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_RepaymentsOfDebt_813BA3D604560A7B25EC086DB4B4D062" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_C38FD18381A87B8D147C086DB4B49499" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_C38FD18381A87B8D147C086DB4B49499" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TotalLongTermDebtRedemptionCost" xlink:label="loc_evrg_TotalLongTermDebtRedemptionCost_03C762B5AA11481D6CE7086DB4B5D257" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_TotalLongTermDebtRedemptionCost_03C762B5AA11481D6CE7086DB4B5D257" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_A6678D9946EE5A1BE7BF086DB4B57F4A" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_A6678D9946EE5A1BE7BF086DB4B57F4A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessAcquisitionFairValueAdjustmentLongTermDebt" xlink:label="loc_evrg_BusinessAcquisitionFairValueAdjustmentLongTermDebt_C641BE1DFC745BD73916086DB4B5CA89" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_BusinessAcquisitionFairValueAdjustmentLongTermDebt_C641BE1DFC745BD73916086DB4B5CA89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_846BEAC6703E8C2A10D5086DB4B5747D" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_846BEAC6703E8C2A10D5086DB4B5747D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRepurchaseAmount" xlink:label="loc_us-gaap_DebtInstrumentRepurchaseAmount_44802C249770B9BC1280086DB4B508C5" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_DebtInstrumentRepurchaseAmount_44802C249770B9BC1280086DB4B508C5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LongTermDebtIncrementalDebtFromKCPLGMOAndGPE" xlink:label="loc_evrg_LongTermDebtIncrementalDebtFromKCPLGMOAndGPE_DD1D8C562494A3C51511086DB4B6BD48" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_LongTermDebtIncrementalDebtFromKCPLGMOAndGPE_DD1D8C562494A3C51511086DB4B6BD48" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplMunicipalBondInsurancePoliciesAbstract" xlink:label="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InsuranceAgreementCovenantIndebtednessToTotalCapitalizationRatioMaximum" xlink:label="loc_evrg_InsuranceAgreementCovenantIndebtednessToTotalCapitalizationRatioMaximum_E113B3C7158932BF3710086DB4B6E1AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:to="loc_evrg_InsuranceAgreementCovenantIndebtednessToTotalCapitalizationRatioMaximum_E113B3C7158932BF3710086DB4B6E1AD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PrincipalOutstandingCoveredByInsurancePolicies" xlink:label="loc_evrg_PrincipalOutstandingCoveredByInsurancePolicies_143CF75339B88D138481086DB4B69BB5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:to="loc_evrg_PrincipalOutstandingCoveredByInsurancePolicies_143CF75339B88D138481086DB4B69BB5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AdditionalCollateralNecessaryDueToIssuanceOfAdditionalMortgageBonds" xlink:label="loc_evrg_AdditionalCollateralNecessaryDueToIssuanceOfAdditionalMortgageBonds_E25C527793770C52CA5E086DB4B74A6D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:to="loc_evrg_AdditionalCollateralNecessaryDueToIssuanceOfAdditionalMortgageBonds_E25C527793770C52CA5E086DB4B74A6D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InsuranceAgreementCovenantDescription" xlink:label="loc_evrg_InsuranceAgreementCovenantDescription_86773C50ADEFDC56D26E086DB4B7327A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:to="loc_evrg_InsuranceAgreementCovenantDescription_86773C50ADEFDC56D26E086DB4B7327A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InsuranceAgreementCovenantCompliance" xlink:label="loc_evrg_InsuranceAgreementCovenantCompliance_D091C9EE77A81ADB4F31086DB4B72E3E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:to="loc_evrg_InsuranceAgreementCovenantCompliance_D091C9EE77A81ADB4F31086DB4B72E3E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ProportionOfSecuredDebtToTotalIndebtednessBasedOnBondRatingsMaximumInHundredths" xlink:label="loc_evrg_ProportionOfSecuredDebtToTotalIndebtednessBasedOnBondRatingsMaximumInHundredths_A795947AD334282F4F6F086DB4B7B539" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:to="loc_evrg_ProportionOfSecuredDebtToTotalIndebtednessBasedOnBondRatingsMaximumInHundredths_A795947AD334282F4F6F086DB4B7B539" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AggregateAmountOfOutstandingGeneralMortgageBondsAsPercentageOfTotalCapitalizationMaximumInHundredths" xlink:label="loc_evrg_AggregateAmountOfOutstandingGeneralMortgageBondsAsPercentageOfTotalCapitalizationMaximumInHundredths_1E270468103D1A3709FA086DB4B77943" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_KcplMunicipalBondInsurancePoliciesAbstract_CF2E8492973CDC0D15A8086DB4B686BB" xlink:to="loc_evrg_AggregateAmountOfOutstandingGeneralMortgageBondsAsPercentageOfTotalCapitalizationMaximumInHundredths_1E270468103D1A3709FA086DB4B77943" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="loc_us-gaap_LongTermDebtByMaturityAbstract_5FEE6B846E1A56BCAEC7086DB4B7E1F2" xlink:type="locator" />
    <link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_us-gaap_LongTermDebtByMaturityAbstract_5FEE6B846E1A56BCAEC7086DB4B7E1F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_FD5F8E4712D0540E3941086DB4B88FBB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_5FEE6B846E1A56BCAEC7086DB4B7E1F2" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_FD5F8E4712D0540E3941086DB4B88FBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_9DB723D7EEDD41F6F5F0086DB4B886CE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_5FEE6B846E1A56BCAEC7086DB4B7E1F2" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_9DB723D7EEDD41F6F5F0086DB4B886CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_746E57C9A79803656D3A086DB4B85A79" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_5FEE6B846E1A56BCAEC7086DB4B7E1F2" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_746E57C9A79803656D3A086DB4B85A79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_F3D3A5F8ECA7F40B255E086DB4B8FBF2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_5FEE6B846E1A56BCAEC7086DB4B7E1F2" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_F3D3A5F8ECA7F40B255E086DB4B8FBF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_0254A86D3E20E2DD8216086DB4B9AF80" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtByMaturityAbstract_5FEE6B846E1A56BCAEC7086DB4B7E1F2" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_0254A86D3E20E2DD8216086DB4B9AF80" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GMOSeniorNotesAbstract" xlink:label="loc_evrg_GMOSeniorNotesAbstract_925BDA0EA52CC802493A086DB4B91F9C" xlink:type="locator" />
    <link:definitionArc order="29" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_GMOSeniorNotesAbstract_925BDA0EA52CC802493A086DB4B91F9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentCovenantDescription" xlink:label="loc_us-gaap_DebtInstrumentCovenantDescription_A5338E8D7A3B69387823086DB4B916AA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_GMOSeniorNotesAbstract_925BDA0EA52CC802493A086DB4B91F9C" xlink:to="loc_us-gaap_DebtInstrumentCovenantDescription_A5338E8D7A3B69387823086DB4B916AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentCovenantCompliance" xlink:label="loc_us-gaap_DebtInstrumentCovenantCompliance_216D529E19AF187BA37A086DB4B9ABB9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_GMOSeniorNotesAbstract_925BDA0EA52CC802493A086DB4B91F9C" xlink:to="loc_us-gaap_DebtInstrumentCovenantCompliance_216D529E19AF187BA37A086DB4B9ABB9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarMortgageBondsAbstract" xlink:label="loc_evrg_WestarMortgageBondsAbstract_97AF89FE46786F547C87086DB4B9206B" xlink:type="locator" />
    <link:definitionArc order="30" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EBB202D70E20EB32DEA6086DB4B07B54" xlink:to="loc_evrg_WestarMortgageBondsAbstract_97AF89FE46786F547C87086DB4B9206B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentRestrictiveCovenants" xlink:label="loc_us-gaap_DebtInstrumentRestrictiveCovenants_8DD845BA4C707F0CE60A086DB4B9EB52" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_WestarMortgageBondsAbstract_97AF89FE46786F547C87086DB4B9206B" xlink:to="loc_us-gaap_DebtInstrumentRestrictiveCovenants_8DD845BA4C707F0CE60A086DB4B9EB52" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AdditionalPrincipalFirstMortgageBondsAvailableToBeIssued" xlink:label="loc_evrg_AdditionalPrincipalFirstMortgageBondsAvailableToBeIssued_67E3361D55FD3BE76685086DB4BA65F6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_WestarMortgageBondsAbstract_97AF89FE46786F547C87086DB4B9206B" xlink:to="loc_evrg_AdditionalPrincipalFirstMortgageBondsAvailableToBeIssued_67E3361D55FD3BE76685086DB4BA65F6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MaximumAmountOfFirstMortgageBondsAuthorized" xlink:label="loc_evrg_MaximumAmountOfFirstMortgageBondsAuthorized_D78BC2D6C1637FA539E4086DB4BA6E67" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_WestarMortgageBondsAbstract_97AF89FE46786F547C87086DB4B9206B" xlink:to="loc_evrg_MaximumAmountOfFirstMortgageBondsAuthorized_D78BC2D6C1637FA539E4086DB4BA6E67" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/LongTermDebtLongTermDebtTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergy" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems" xlink:label="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ABABCC7C47FFA417CD4A07174A84C576" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ABABCC7C47FFA417CD4A07174A84C576" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_E65CBBAD5D0FD370686D07174A84A7E6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ABABCC7C47FFA417CD4A07174A84C576" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_E65CBBAD5D0FD370686D07174A84A7E6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2332C9E30163C454829307174A85F3AC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_E65CBBAD5D0FD370686D07174A84A7E6" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2332C9E30163C454829307174A85F3AC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2332C9E30163C454829307174A85F3AC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_E65CBBAD5D0FD370686D07174A84A7E6" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2332C9E30163C454829307174A85F3AC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_5BC2C4F244610F1F3F0807174A85289A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2332C9E30163C454829307174A85F3AC" xlink:to="loc_evrg_WestarEnergyIncMember_5BC2C4F244610F1F3F0807174A85289A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_26ADB3FE8AC1D21188C907174A851557" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2332C9E30163C454829307174A85F3AC" xlink:to="loc_evrg_GreatPlainsEnergyMember_26ADB3FE8AC1D21188C907174A851557" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_8AC53A5B565AFF0BCC8B07174A85A583" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ABABCC7C47FFA417CD4A07174A84C576" xlink:to="loc_dei_LegalEntityAxis_8AC53A5B565AFF0BCC8B07174A85A583" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E84ED17EE1EC5767BBCB07174A8522FD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8AC53A5B565AFF0BCC8B07174A85A583" xlink:to="loc_dei_EntityDomain_E84ED17EE1EC5767BBCB07174A8522FD_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E84ED17EE1EC5767BBCB07174A8522FD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8AC53A5B565AFF0BCC8B07174A85A583" xlink:to="loc_dei_EntityDomain_E84ED17EE1EC5767BBCB07174A8522FD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_6EA077A88A606975979507174A86CAF4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E84ED17EE1EC5767BBCB07174A8522FD" xlink:to="loc_evrg_WestarEnergyIncMember_6EA077A88A606975979507174A86CAF4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_C7209615BCD4F8DFE09907174A862A08" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E84ED17EE1EC5767BBCB07174A8522FD" xlink:to="loc_evrg_GreatPlainsEnergyMember_C7209615BCD4F8DFE09907174A862A08" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_3CBBEAFDAAA849CB49E307174A861006" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E84ED17EE1EC5767BBCB07174A8522FD" xlink:to="loc_evrg_KCPLMember_3CBBEAFDAAA849CB49E307174A861006" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_9863601358D7BC3C2C6107174A86A391" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E84ED17EE1EC5767BBCB07174A8522FD" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_9863601358D7BC3C2C6107174A86A391" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingAxis" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_E6A8B7CF269E710A7A4207174A877E46" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ABABCC7C47FFA417CD4A07174A84C576" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_E6A8B7CF269E710A7A4207174A877E46" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_2B4409A670667591AFAE07174A878BE3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_E6A8B7CF269E710A7A4207174A877E46" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_2B4409A670667591AFAE07174A878BE3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_2B4409A670667591AFAE07174A878BE3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_E6A8B7CF269E710A7A4207174A877E46" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_2B4409A670667591AFAE07174A878BE3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MergerSettlementAgreementMember" xlink:label="loc_evrg_MergerSettlementAgreementMember_F6BC31DAD7506D16F04307174A876D9F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_2B4409A670667591AFAE07174A878BE3" xlink:to="loc_evrg_MergerSettlementAgreementMember_F6BC31DAD7506D16F04307174A876D9F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyAxis" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_32CDF5E520775CE674D407174A87B66F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ABABCC7C47FFA417CD4A07174A84C576" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_32CDF5E520775CE674D407174A87B66F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_D0D4E358FF8BD5D56B7207174A88CCE4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_32CDF5E520775CE674D407174A87B66F" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_D0D4E358FF8BD5D56B7207174A88CCE4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_D0D4E358FF8BD5D56B7207174A88CCE4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_32CDF5E520775CE674D407174A87B66F" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_D0D4E358FF8BD5D56B7207174A88CCE4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasCorporationCommissionMember" xlink:label="loc_evrg_KansasCorporationCommissionMember_AE5955AF60F0E3732A4507174A88B35B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_D0D4E358FF8BD5D56B7207174A88CCE4" xlink:to="loc_evrg_KansasCorporationCommissionMember_AE5955AF60F0E3732A4507174A88B35B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MissouriPublicServiceCommissionMember" xlink:label="loc_evrg_MissouriPublicServiceCommissionMember_ACC3DA18BB88CE0DFB9D07174A8888E5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_D0D4E358FF8BD5D56B7207174A88CCE4" xlink:to="loc_evrg_MissouriPublicServiceCommissionMember_ACC3DA18BB88CE0DFB9D07174A8888E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonrecurringAdjustmentAxis" xlink:label="loc_us-gaap_NonrecurringAdjustmentAxis_AB5A249509544F13D9B607174A88231E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ABABCC7C47FFA417CD4A07174A84C576" xlink:to="loc_us-gaap_NonrecurringAdjustmentAxis_AB5A249509544F13D9B607174A88231E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonrecurringAdjustmentDomain" xlink:label="loc_us-gaap_NonrecurringAdjustmentDomain_474F0935F6E11B5F0F3407174A885784_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_NonrecurringAdjustmentAxis_AB5A249509544F13D9B607174A88231E" xlink:to="loc_us-gaap_NonrecurringAdjustmentDomain_474F0935F6E11B5F0F3407174A885784_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonrecurringAdjustmentDomain" xlink:label="loc_us-gaap_NonrecurringAdjustmentDomain_474F0935F6E11B5F0F3407174A885784" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_NonrecurringAdjustmentAxis_AB5A249509544F13D9B607174A88231E" xlink:to="loc_us-gaap_NonrecurringAdjustmentDomain_474F0935F6E11B5F0F3407174A885784" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AcquisitionRelatedCostsMember" xlink:label="loc_us-gaap_AcquisitionRelatedCostsMember_F97DC648883344251CF907174A891D5C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonrecurringAdjustmentDomain_474F0935F6E11B5F0F3407174A885784" xlink:to="loc_us-gaap_AcquisitionRelatedCostsMember_F97DC648883344251CF907174A891D5C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationMergerRelatedCostsAfterTax" xlink:label="loc_evrg_BusinessCombinationMergerRelatedCostsAfterTax_C335E51A0DE958C0201E0741588BF920" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_BusinessCombinationMergerRelatedCostsAfterTax_C335E51A0DE958C0201E0741588BF920" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_BAFEB3EC925510DA6FDE07174A89A367" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_BAFEB3EC925510DA6FDE07174A89A367" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessAcquisitionConversionRatio" xlink:label="loc_evrg_BusinessAcquisitionConversionRatio_DFFB0D4DFFECF0782E2007174A8981EE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_BusinessAcquisitionConversionRatio_DFFB0D4DFFECF0782E2007174A8981EE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedOneTimeBillCredits" xlink:label="loc_evrg_PublicUtilitiesEstimatedOneTimeBillCredits_32C70F97DF886D4CAAF407174A8A1DAD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_PublicUtilitiesEstimatedOneTimeBillCredits_32C70F97DF886D4CAAF407174A8A1DAD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedAdditionalBillCredits" xlink:label="loc_evrg_PublicUtilitiesEstimatedAdditionalBillCredits_128A04A9376F568A46FC07174A8AF790" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_PublicUtilitiesEstimatedAdditionalBillCredits_128A04A9376F568A46FC07174A8AF790" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedAdditionalBillCreditsAnnualAmount" xlink:label="loc_evrg_PublicUtilitiesEstimatedAdditionalBillCreditsAnnualAmount_9A769AAA6D697EBCC5F507174A8A2C47" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_PublicUtilitiesEstimatedAdditionalBillCreditsAnnualAmount_9A769AAA6D697EBCC5F507174A8A2C47" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesSavingsOnCurrentRateCases" xlink:label="loc_evrg_PublicUtilitiesSavingsOnCurrentRateCases_281F6DA0F9EF56E39B7207174A8A0A76" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_PublicUtilitiesSavingsOnCurrentRateCases_281F6DA0F9EF56E39B7207174A8A0A76" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesBaseRateMoratoriumPeriod" xlink:label="loc_evrg_PublicUtilitiesBaseRateMoratoriumPeriod_95E76FFEC242311BF92807174A8A1EC6" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_PublicUtilitiesBaseRateMoratoriumPeriod_95E76FFEC242311BF92807174A8A1EC6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCCMergerROERefund" xlink:label="loc_evrg_KCCMergerROERefund_A747146814D44F3FCA0C07174A8BFE58" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_KCCMergerROERefund_A747146814D44F3FCA0C07174A8BFE58" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_CharitableContributionsPeriod" xlink:label="loc_evrg_CharitableContributionsPeriod_C061597055EE664D091F07174A8BB754" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_CharitableContributionsPeriod_C061597055EE664D091F07174A8BB754" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MergerTransactionCostsRecoveryAmount" xlink:label="loc_evrg_MergerTransactionCostsRecoveryAmount_B5AD432ADDA2E2D4C6D507174A8BF7E7" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_MergerTransactionCostsRecoveryAmount_B5AD432ADDA2E2D4C6D507174A8BF7E7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MergerTransactionCostsRecoveryPeriod" xlink:label="loc_evrg_MergerTransactionCostsRecoveryPeriod_6A0605E6C69F7369296607174A8B52B3" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_MergerTransactionCostsRecoveryPeriod_6A0605E6C69F7369296607174A8B52B3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedOneTimeBillCreditsPeriod" xlink:label="loc_evrg_PublicUtilitiesEstimatedOneTimeBillCreditsPeriod_62896256EBE6DEE255D607174A8B5AD9" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_PublicUtilitiesEstimatedOneTimeBillCreditsPeriod_62896256EBE6DEE255D607174A8B5AD9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SupportToPromoteLowIncomeWeatherizationEffortsAmount" xlink:label="loc_evrg_SupportToPromoteLowIncomeWeatherizationEffortsAmount_3AFE867D437E0EA153C907174A8B7DE0" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_SupportToPromoteLowIncomeWeatherizationEffortsAmount_3AFE867D437E0EA153C907174A8B7DE0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SupportToPromoteLowIncomeWeatherizationEffortsPeriod" xlink:label="loc_evrg_SupportToPromoteLowIncomeWeatherizationEffortsPeriod_CEE7791864179EA2383F07174A8C1293" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_evrg_SupportToPromoteLowIncomeWeatherizationEffortsPeriod_CEE7791864179EA2383F07174A8C1293" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_2A8388CF4510BACE155107174A8C5F89" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_2A8388CF4510BACE155107174A8C5F89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_8199CFB3B9ED99C5993B07174A8C70FD" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AnticipatedAcquisitionOfWestarEnergyInc.LineItems_78A4F9F4731C3BF5372007174A892FF4" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_8199CFB3B9ED99C5993B07174A8C70FD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyPurchasePriceAllocationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2A90504696D46CEED3EA1A3D02C863A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2A90504696D46CEED3EA1A3D02C863A9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_D5DBD9F3187E9030EA941A3D02C8A8EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2A90504696D46CEED3EA1A3D02C863A9" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_D5DBD9F3187E9030EA941A3D02C8A8EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_4EF4EBC2571CF5355EEC1A3D02C8A694_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_D5DBD9F3187E9030EA941A3D02C8A8EA" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_4EF4EBC2571CF5355EEC1A3D02C8A694_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_4EF4EBC2571CF5355EEC1A3D02C8A694" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_D5DBD9F3187E9030EA941A3D02C8A8EA" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_4EF4EBC2571CF5355EEC1A3D02C8A694" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_A6F9216ADAAA6E1F71F71A3D02C8AACD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_4EF4EBC2571CF5355EEC1A3D02C8A694" xlink:to="loc_us-gaap_CommonStockMember_A6F9216ADAAA6E1F71F71A3D02C8AACD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockCompensationPlanMember" xlink:label="loc_us-gaap_StockCompensationPlanMember_7CFBEB3D45658E15859E1A3D02C8CCD5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_4EF4EBC2571CF5355EEC1A3D02C8A694" xlink:to="loc_us-gaap_StockCompensationPlanMember_7CFBEB3D45658E15859E1A3D02C8CCD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_41D0327311EDCBCDA5761A3D02C94ED2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2A90504696D46CEED3EA1A3D02C863A9" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_41D0327311EDCBCDA5761A3D02C94ED2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BAA32ECBCFFAAD66A5501A3D02C95E7F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_41D0327311EDCBCDA5761A3D02C94ED2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BAA32ECBCFFAAD66A5501A3D02C95E7F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BAA32ECBCFFAAD66A5501A3D02C95E7F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_41D0327311EDCBCDA5761A3D02C94ED2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BAA32ECBCFFAAD66A5501A3D02C95E7F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_F13FE9CA48C6460AD3541A3D02C93D56" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_BAA32ECBCFFAAD66A5501A3D02C95E7F" xlink:to="loc_evrg_GreatPlainsEnergyMember_F13FE9CA48C6460AD3541A3D02C93D56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_0E3584C4885AE2EF5C481A3D02CADF1B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_0E3584C4885AE2EF5C481A3D02CADF1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_C2C2F0F1EE0A0BCF0F8F1A3D02CA0E17" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_C2C2F0F1EE0A0BCF0F8F1A3D02CA0E17" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationNumberOfSharesConverted" xlink:label="loc_evrg_BusinessCombinationNumberOfSharesConverted_48B9B996247ED1EFECB61A3D02CA8ACE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_evrg_BusinessCombinationNumberOfSharesConverted_48B9B996247ED1EFECB61A3D02CA8ACE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessAcquisitionConversionRatio" xlink:label="loc_evrg_BusinessAcquisitionConversionRatio_CF0F318A0D8AAA660EA11A3D02CA491C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_evrg_BusinessAcquisitionConversionRatio_CF0F318A0D8AAA660EA11A3D02CA491C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_EACD4EC0246F8D638A7D1A3D02CA9309" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_EACD4EC0246F8D638A7D1A3D02CA9309" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionSharePrice" xlink:label="loc_us-gaap_BusinessAcquisitionSharePrice_866213C01DD38BD56AE91A3D02CB1FB1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_us-gaap_BusinessAcquisitionSharePrice_866213C01DD38BD56AE91A3D02CB1FB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_4819E7CE953A88E1FDD61A3D02CBEF6B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_4819E7CE953A88E1FDD61A3D02CBEF6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_7C78FB9C7CBDCB7DB59E1A3D02CB9505" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_719BB2EE04B4A2114F5F1A3D02CAFB83" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_7C78FB9C7CBDCB7DB59E1A3D02CB9505" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyScheduleAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_818DF39978D1D3C607E51A3D052967CB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_818DF39978D1D3C607E51A3D052967CB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_71C38007AF42C9A98AF01A3D05295F2D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_818DF39978D1D3C607E51A3D052967CB" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_71C38007AF42C9A98AF01A3D05295F2D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_975B083557BE15FB4C9B1A3D05293805_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_71C38007AF42C9A98AF01A3D05295F2D" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_975B083557BE15FB4C9B1A3D05293805_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_975B083557BE15FB4C9B1A3D05293805" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_71C38007AF42C9A98AF01A3D05295F2D" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_975B083557BE15FB4C9B1A3D05293805" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_CFC7985DC9DE279004671A3D052A8F14" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_975B083557BE15FB4C9B1A3D05293805" xlink:to="loc_evrg_GreatPlainsEnergyMember_CFC7985DC9DE279004671A3D052A8F14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_1681DE2CE0763F1F8E3D1A3D052A1870" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_1681DE2CE0763F1F8E3D1A3D052A1870" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_410D126E0A18CBF524131A3D052BA70A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_410D126E0A18CBF524131A3D052BA70A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_DFF01080EAF288ED40A61A3D052BF214" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_Goodwill_DFF01080EAF288ED40A61A3D052BF214" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_8A3F73414B99497AFD921A3D052B8934" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_8A3F73414B99497AFD921A3D052B8934" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_90B21301E9FA04BA6DDF1A3D052B0CAA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_90B21301E9FA04BA6DDF1A3D052B0CAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_63BB112681165C1287501A3D052B524F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_63BB112681165C1287501A3D052B524F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_86C221E4BD5856DE49201A3D052BCE85" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_86C221E4BD5856DE49201A3D052BCE85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_C5445146974DCD10677B1A3D052CDE72" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_C5445146974DCD10677B1A3D052CDE72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_8F332E576F124E216FFF1A3D052C8CF9" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_8F332E576F124E216FFF1A3D052C8CF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_0D7F8CF18C7C4BA888E81A3D052C1632" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_FAF4CAA5CC4048AF6A641A3D052A90B1" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_0D7F8CF18C7C4BA888E81A3D052C1632" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyScheduleOfPreTaxCostsAndDeferralsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8AC0A413F2D196840298F2EBD9E540D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8AC0A413F2D196840298F2EBD9E540D5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingAxis" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_D460C5B5E936AAD880ADF2EBD9E587D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8AC0A413F2D196840298F2EBD9E540D5" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_D460C5B5E936AAD880ADF2EBD9E587D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_0B1E534FB5F2C6A7AC5DF2EBD9E9777A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_D460C5B5E936AAD880ADF2EBD9E587D1" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_0B1E534FB5F2C6A7AC5DF2EBD9E9777A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_0B1E534FB5F2C6A7AC5DF2EBD9E9777A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_D460C5B5E936AAD880ADF2EBD9E587D1" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_0B1E534FB5F2C6A7AC5DF2EBD9E9777A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MergerSettlementAgreementMember" xlink:label="loc_evrg_MergerSettlementAgreementMember_3BC6143CA5ACF794B737F2EBD9E9FE41" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_0B1E534FB5F2C6A7AC5DF2EBD9E9777A" xlink:to="loc_evrg_MergerSettlementAgreementMember_3BC6143CA5ACF794B737F2EBD9E9FE41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyAxis" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_3B5F994696A3F8960A33F2EBD9E96247" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8AC0A413F2D196840298F2EBD9E540D5" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_3B5F994696A3F8960A33F2EBD9E96247" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_0A0E1A08245C98564D0DF2EBD9E9387B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_3B5F994696A3F8960A33F2EBD9E96247" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_0A0E1A08245C98564D0DF2EBD9E9387B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_0A0E1A08245C98564D0DF2EBD9E9387B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_3B5F994696A3F8960A33F2EBD9E96247" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_0A0E1A08245C98564D0DF2EBD9E9387B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasCorporationCommissionMember" xlink:label="loc_evrg_KansasCorporationCommissionMember_578D35E8E9B1BC895C79F2EBD9E9BD13" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_0A0E1A08245C98564D0DF2EBD9E9387B" xlink:to="loc_evrg_KansasCorporationCommissionMember_578D35E8E9B1BC895C79F2EBD9E9BD13" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_46B53FB63EEC8032E9D1F2EBD9E90CFF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8AC0A413F2D196840298F2EBD9E540D5" xlink:to="loc_dei_LegalEntityAxis_46B53FB63EEC8032E9D1F2EBD9E90CFF" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6A3F18B685BD1485FD64F2EBD9E90FFE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_46B53FB63EEC8032E9D1F2EBD9E90CFF" xlink:to="loc_dei_EntityDomain_6A3F18B685BD1485FD64F2EBD9E90FFE_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6A3F18B685BD1485FD64F2EBD9E90FFE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_46B53FB63EEC8032E9D1F2EBD9E90CFF" xlink:to="loc_dei_EntityDomain_6A3F18B685BD1485FD64F2EBD9E90FFE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_B564681480E6E3C4CE5AF2EBD9E93F64" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6A3F18B685BD1485FD64F2EBD9E90FFE" xlink:to="loc_evrg_WestarEnergyIncMember_B564681480E6E3C4CE5AF2EBD9E93F64" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_B2CD876B9C78EFD24089F2EBD9E936D4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6A3F18B685BD1485FD64F2EBD9E90FFE" xlink:to="loc_evrg_KCPLMember_B2CD876B9C78EFD24089F2EBD9E936D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_CEB78567209DDD525B02F2EBD9E91559" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_8AC0A413F2D196840298F2EBD9E540D5" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_CEB78567209DDD525B02F2EBD9E91559" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6FFA75FE533C7352B7DBF2EBD9E956AE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_CEB78567209DDD525B02F2EBD9E91559" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6FFA75FE533C7352B7DBF2EBD9E956AE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6FFA75FE533C7352B7DBF2EBD9E956AE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_CEB78567209DDD525B02F2EBD9E91559" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6FFA75FE533C7352B7DBF2EBD9E956AE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_76F08C2C8F9FD405EA17F2EBD9E9E6C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6FFA75FE533C7352B7DBF2EBD9E956AE" xlink:to="loc_evrg_GreatPlainsEnergyMember_76F08C2C8F9FD405EA17F2EBD9E9E6C8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedAdditionalBillCreditsAnnualAmount" xlink:label="loc_evrg_PublicUtilitiesEstimatedAdditionalBillCreditsAnnualAmount_0A23EC5495AF4A6E1181F2EBD9E91037" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_PublicUtilitiesEstimatedAdditionalBillCreditsAnnualAmount_0A23EC5495AF4A6E1181F2EBD9E91037" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsOneTimeBillCredits" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsOneTimeBillCredits_8C5D2CA3A005B4A20E59F2EBD9E9CD76" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsOneTimeBillCredits_8C5D2CA3A005B4A20E59F2EBD9E9CD76" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsAnnualBillCredits" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsAnnualBillCredits_2C3453CE43C0672FDF27F2EBD9E99BBA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsAnnualBillCredits_2C3453CE43C0672FDF27F2EBD9E99BBA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsCustomerBillCredits" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsCustomerBillCredits_B41B8F1B9B241C5FB50EF2EBD9E9D233" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsCustomerBillCredits_B41B8F1B9B241C5FB50EF2EBD9E9D233" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsCharitableContributionsAndCommunitySupport" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsCharitableContributionsAndCommunitySupport_97E7EE0DD16CEC799505F2EBD9E9FA4D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsCharitableContributionsAndCommunitySupport_97E7EE0DD16CEC799505F2EBD9E9FA4D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsVoluntarySeveranceAndAcceleratedEquityCompensation" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsVoluntarySeveranceAndAcceleratedEquityCompensation_49FB7BBF107710684750F2EBD9EDE0C6" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsVoluntarySeveranceAndAcceleratedEquityCompensation_49FB7BBF107710684750F2EBD9EDE0C6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsOtherTransactionAndTransitionCosts" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsOtherTransactionAndTransitionCosts_B69525DCFDE0BCA839E6F2EBD9ED3B44" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsOtherTransactionAndTransitionCosts_B69525DCFDE0BCA839E6F2EBD9ED3B44" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsReallocationAndDeferredTransactionCosts" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsReallocationAndDeferredTransactionCosts_35CAA79D1A9D86DF3499F2EBD9EDD17D" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsReallocationAndDeferredTransactionCosts_35CAA79D1A9D86DF3499F2EBD9EDD17D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsImpactToOperatingAndMaintenanceExpense" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsImpactToOperatingAndMaintenanceExpense_42DF69F181A88C9917A7F2EBD9EDB881" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsImpactToOperatingAndMaintenanceExpense_42DF69F181A88C9917A7F2EBD9EDB881" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationAcquisitionRelatedCostsChargesAndDeferrals" xlink:label="loc_evrg_BusinessCombinationAcquisitionRelatedCostsChargesAndDeferrals_CF030DF1919D5B90DFF6F2EBD9EDDAA1" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_CD3608BDC196D2A71924F2EBD9E99F57" xlink:to="loc_evrg_BusinessCombinationAcquisitionRelatedCostsChargesAndDeferrals_CF030DF1919D5B90DFF6F2EBD9EDDAA1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/MergerOfGreatPlainsEnergyAndWestarEnergyUnauditedProFormaFinancialInformationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2F283FB0DE2F5BD23F2707174A5232D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2F283FB0DE2F5BD23F2707174A5232D3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonrecurringAdjustmentAxis" xlink:label="loc_us-gaap_NonrecurringAdjustmentAxis_2061344B4C9649EB17D60742601CC418" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2F283FB0DE2F5BD23F2707174A5232D3" xlink:to="loc_us-gaap_NonrecurringAdjustmentAxis_2061344B4C9649EB17D60742601CC418" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonrecurringAdjustmentDomain" xlink:label="loc_us-gaap_NonrecurringAdjustmentDomain_2E5B6415FFF98D86DA6C0742601F0499_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_NonrecurringAdjustmentAxis_2061344B4C9649EB17D60742601CC418" xlink:to="loc_us-gaap_NonrecurringAdjustmentDomain_2E5B6415FFF98D86DA6C0742601F0499_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonrecurringAdjustmentDomain" xlink:label="loc_us-gaap_NonrecurringAdjustmentDomain_2E5B6415FFF98D86DA6C0742601F0499" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_NonrecurringAdjustmentAxis_2061344B4C9649EB17D60742601CC418" xlink:to="loc_us-gaap_NonrecurringAdjustmentDomain_2E5B6415FFF98D86DA6C0742601F0499" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AcquisitionRelatedCostsMember" xlink:label="loc_us-gaap_AcquisitionRelatedCostsMember_66FA2A13AC8875DCD36B0742604A1A05" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonrecurringAdjustmentDomain_2E5B6415FFF98D86DA6C0742601F0499" xlink:to="loc_us-gaap_AcquisitionRelatedCostsMember_66FA2A13AC8875DCD36B0742604A1A05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_026B3051E43F6FD5053907174A53B485" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_2F283FB0DE2F5BD23F2707174A5232D3" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_026B3051E43F6FD5053907174A53B485" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_170D791810235FC6B7D407174A53E8BD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_026B3051E43F6FD5053907174A53B485" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_170D791810235FC6B7D407174A53E8BD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_170D791810235FC6B7D407174A53E8BD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_026B3051E43F6FD5053907174A53B485" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_170D791810235FC6B7D407174A53E8BD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_C5715B48D9AE9F6EE00407174A5304AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_170D791810235FC6B7D407174A53E8BD" xlink:to="loc_evrg_GreatPlainsEnergyMember_C5715B48D9AE9F6EE00407174A5304AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_A5143A60B8AE575DE8B507174A54012B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_A5143A60B8AE575DE8B507174A54012B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_B51EEC17823EF347D48007174A540B96" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_B51EEC17823EF347D48007174A540B96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_BE7C46DEE96DCE3D32A107174A540DAC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_BE7C46DEE96DCE3D32A107174A540DAC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_5D775FA332751ADBAEAA07174A547B7E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_5D775FA332751ADBAEAA07174A547B7E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationFinancingRelatedChargesAfterTax" xlink:label="loc_evrg_BusinessCombinationFinancingRelatedChargesAfterTax_02E65CB078712DDB4B10073D757DBCF2" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_evrg_BusinessCombinationFinancingRelatedChargesAfterTax_02E65CB078712DDB4B10073D757DBCF2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MergerContingentAfterTaxMarkToMarketInterestRateSwapGains" xlink:label="loc_evrg_MergerContingentAfterTaxMarkToMarketInterestRateSwapGains_2867647B1281A1A48275073DF9918B85" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_evrg_MergerContingentAfterTaxMarkToMarketInterestRateSwapGains_2867647B1281A1A48275073DF9918B85" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationMergerRelatedCostsAfterTax" xlink:label="loc_evrg_BusinessCombinationMergerRelatedCostsAfterTax_70D7FC00F61817BBFE1A073F3008736C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_evrg_BusinessCombinationMergerRelatedCostsAfterTax_70D7FC00F61817BBFE1A073F3008736C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_BusinessCombinationOneTimeBillCreditsAfterTax" xlink:label="loc_evrg_BusinessCombinationOneTimeBillCreditsAfterTax_33DC9E8D6F73FC9433CD07408EC61796" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F4D849DE8B0C2F4F098A07174A5311DB" xlink:to="loc_evrg_BusinessCombinationOneTimeBillCreditsAfterTax_33DC9E8D6F73FC9433CD07408EC61796" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/PensionPlansAndOtherEmployeeBenefits" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/PensionPlansAndOtherEmployeeBenefitsPensionPlansAndPostRetirementBenefitsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantAxis" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantAxis_B25A6A7C68A0D7644CAA0C269DEF3FE8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantAxis_B25A6A7C68A0D7644CAA0C269DEF3FE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_2F778E45D9347A45698A0C269DEF4B4A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_B25A6A7C68A0D7644CAA0C269DEF3FE8" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_2F778E45D9347A45698A0C269DEF4B4A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_2F778E45D9347A45698A0C269DEF4B4A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_B25A6A7C68A0D7644CAA0C269DEF3FE8" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_2F778E45D9347A45698A0C269DEF4B4A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedNuclearPowerPlantMember" xlink:label="loc_us-gaap_JointlyOwnedNuclearPowerPlantMember_31F601E2A375490BFF4E0C269DEF4626" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_2F778E45D9347A45698A0C269DEF4B4A" xlink:to="loc_us-gaap_JointlyOwnedNuclearPowerPlantMember_31F601E2A375490BFF4E0C269DEF4626" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_B9E2DB8711788B9D2A8E0C269DF0CEC1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_B9E2DB8711788B9D2A8E0C269DF0CEC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_E49599C2907A3465DFAD0C269DF083F1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B9E2DB8711788B9D2A8E0C269DF0CEC1" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_E49599C2907A3465DFAD0C269DF083F1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_E49599C2907A3465DFAD0C269DF083F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B9E2DB8711788B9D2A8E0C269DF0CEC1" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_E49599C2907A3465DFAD0C269DF083F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_612C8E31B6A79B73C3540C269DF0B6AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_E49599C2907A3465DFAD0C269DF083F1" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_612C8E31B6A79B73C3540C269DF0B6AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_1DA3D0DA5BCD215CB9B50C269DF1D2F4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_E49599C2907A3465DFAD0C269DF083F1" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_1DA3D0DA5BCD215CB9B50C269DF1D2F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_5BBEC34FCDB05F58F3720C269DF11BE4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_5BBEC34FCDB05F58F3720C269DF11BE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_ED9696DE58D3736EE96D0C269DF186A6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_5BBEC34FCDB05F58F3720C269DF11BE4" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_ED9696DE58D3736EE96D0C269DF186A6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_ED9696DE58D3736EE96D0C269DF186A6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_5BBEC34FCDB05F58F3720C269DF11BE4" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_ED9696DE58D3736EE96D0C269DF186A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTaxStatusAxis" xlink:label="loc_us-gaap_RetirementPlanTaxStatusAxis_EC9D8049E80E5F2318B10C269DF1E570" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_RetirementPlanTaxStatusAxis_EC9D8049E80E5F2318B10C269DF1E570" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTaxStatusDomain" xlink:label="loc_us-gaap_RetirementPlanTaxStatusDomain_C83EB942DE0CA1297BE60C269DF1A31F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTaxStatusAxis_EC9D8049E80E5F2318B10C269DF1E570" xlink:to="loc_us-gaap_RetirementPlanTaxStatusDomain_C83EB942DE0CA1297BE60C269DF1A31F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTaxStatusDomain" xlink:label="loc_us-gaap_RetirementPlanTaxStatusDomain_C83EB942DE0CA1297BE60C269DF1A31F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTaxStatusAxis_EC9D8049E80E5F2318B10C269DF1E570" xlink:to="loc_us-gaap_RetirementPlanTaxStatusDomain_C83EB942DE0CA1297BE60C269DF1A31F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanFundingStatusAxis" xlink:label="loc_us-gaap_RetirementPlanFundingStatusAxis_595CBF3E2A2A08111F690C269DF2439A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_RetirementPlanFundingStatusAxis_595CBF3E2A2A08111F690C269DF2439A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanFundingStatusDomain" xlink:label="loc_us-gaap_RetirementPlanFundingStatusDomain_81A00C45C6BAB99A8F460C269DF23509_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanFundingStatusAxis_595CBF3E2A2A08111F690C269DF2439A" xlink:to="loc_us-gaap_RetirementPlanFundingStatusDomain_81A00C45C6BAB99A8F460C269DF23509_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanFundingStatusDomain" xlink:label="loc_us-gaap_RetirementPlanFundingStatusDomain_81A00C45C6BAB99A8F460C269DF23509" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanFundingStatusAxis_595CBF3E2A2A08111F690C269DF2439A" xlink:to="loc_us-gaap_RetirementPlanFundingStatusDomain_81A00C45C6BAB99A8F460C269DF23509" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameAxis" xlink:label="loc_us-gaap_RetirementPlanNameAxis_848A9CD59EA09879F64C0C269DF77CC9" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_RetirementPlanNameAxis_848A9CD59EA09879F64C0C269DF77CC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameDomain" xlink:label="loc_us-gaap_RetirementPlanNameDomain_C682AF8E57FB051BEA890C269DF7E481_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanNameAxis_848A9CD59EA09879F64C0C269DF77CC9" xlink:to="loc_us-gaap_RetirementPlanNameDomain_C682AF8E57FB051BEA890C269DF7E481_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanNameDomain" xlink:label="loc_us-gaap_RetirementPlanNameDomain_C682AF8E57FB051BEA890C269DF7E481" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanNameAxis_848A9CD59EA09879F64C0C269DF77CC9" xlink:to="loc_us-gaap_RetirementPlanNameDomain_C682AF8E57FB051BEA890C269DF7E481" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_E646A2B8DF1A2B753F440C269DF8F8C1" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_E646A2B8DF1A2B753F440C269DF8F8C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_E646A2B8DF1A2B753F440C269DF8F8C1" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_E646A2B8DF1A2B753F440C269DF8F8C1" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesUsMember" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesUsMember_590166529CE27AF0D7F40C269DF8419D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesUsMember_590166529CE27AF0D7F40C269DF8419D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember_94DC9E5B9E4972DE9F490C269DF86DE8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember_94DC9E5B9E4972DE9F490C269DF86DE8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanBondMember" xlink:label="loc_evrg_DefinedBenefitPlanBondMember_219AB47C407A1DB2D91D0C269DF99D2C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424" xlink:to="loc_evrg_DefinedBenefitPlanBondMember_219AB47C407A1DB2D91D0C269DF99D2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_999EF7E0DC0B8FD18E740C269DF9B762" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_999EF7E0DC0B8FD18E740C269DF9B762" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanRealEstateMember" xlink:label="loc_us-gaap_DefinedBenefitPlanRealEstateMember_1452661D39B098487EEF0C269DF98D44" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424" xlink:to="loc_us-gaap_DefinedBenefitPlanRealEstateMember_1452661D39B098487EEF0C269DF98D44" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanOtherInvestmentMember" xlink:label="loc_evrg_DefinedBenefitPlanOtherInvestmentMember_0E88889A5C7A86CF15350C269DF9D708" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_D8C57C00EFDF480796220C269DF89424" xlink:to="loc_evrg_DefinedBenefitPlanOtherInvestmentMember_0E88889A5C7A86CF15350C269DF9D708" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1F031F4F9DA5DC016EC90C269DF9E2F7" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1F031F4F9DA5DC016EC90C269DF9E2F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0C0A4471C27BCBA67C170C269DF9CB77_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1F031F4F9DA5DC016EC90C269DF9E2F7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0C0A4471C27BCBA67C170C269DF9CB77_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0C0A4471C27BCBA67C170C269DF9CB77" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1F031F4F9DA5DC016EC90C269DF9E2F7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0C0A4471C27BCBA67C170C269DF9CB77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesByInvestmentObjectiveAxis" xlink:label="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_C0830B17455E39C1B67E0C269DFA5338" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_C0830B17455E39C1B67E0C269DFA5338" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesInvestmentObjectiveMember" xlink:label="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_49B49BC75F41E2BCB2530C269DFADDE8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_C0830B17455E39C1B67E0C269DFA5338" xlink:to="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_49B49BC75F41E2BCB2530C269DFADDE8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesInvestmentObjectiveMember" xlink:label="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_49B49BC75F41E2BCB2530C269DFADDE8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_C0830B17455E39C1B67E0C269DFA5338" xlink:to="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_49B49BC75F41E2BCB2530C269DFADDE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6DE7C35750E51FE33DD20C269DFABCE4" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6DE7C35750E51FE33DD20C269DFABCE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_65A870715884275974CE0C269DFA237F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6DE7C35750E51FE33DD20C269DFABCE4" xlink:to="loc_us-gaap_RelatedPartyDomain_65A870715884275974CE0C269DFA237F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_65A870715884275974CE0C269DFA237F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6DE7C35750E51FE33DD20C269DFABCE4" xlink:to="loc_us-gaap_RelatedPartyDomain_65A870715884275974CE0C269DFA237F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_310397566C45761A974A0C269DFAA3D7" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_310397566C45761A974A0C269DFAA3D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_E514E2DE3A22ECC6DAB30C269DFB48D0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_310397566C45761A974A0C269DFAA3D7" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_E514E2DE3A22ECC6DAB30C269DFB48D0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_E514E2DE3A22ECC6DAB30C269DFB48D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_310397566C45761A974A0C269DFAA3D7" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_E514E2DE3A22ECC6DAB30C269DFB48D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_C7223AB4E53323F49AD10C269DFB8699" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_srt_RangeAxis_C7223AB4E53323F49AD10C269DFB8699" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_A5A4053BE771C2EBCDAA0C269DFB1E13_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_C7223AB4E53323F49AD10C269DFB8699" xlink:to="loc_srt_RangeMember_A5A4053BE771C2EBCDAA0C269DFB1E13_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_A5A4053BE771C2EBCDAA0C269DFB1E13" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_C7223AB4E53323F49AD10C269DFB8699" xlink:to="loc_srt_RangeMember_A5A4053BE771C2EBCDAA0C269DFB1E13" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_FFD002946C88AC878CA70C269DFB9679" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_762CDE82D175A32F96E30C269DEECEDC" xlink:to="loc_dei_LegalEntityAxis_FFD002946C88AC878CA70C269DFB9679" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_DEF8D19FC6FE10CA0B500C269DFCBF9E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_FFD002946C88AC878CA70C269DFB9679" xlink:to="loc_dei_EntityDomain_DEF8D19FC6FE10CA0B500C269DFCBF9E_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_DEF8D19FC6FE10CA0B500C269DFCBF9E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_FFD002946C88AC878CA70C269DFB9679" xlink:to="loc_dei_EntityDomain_DEF8D19FC6FE10CA0B500C269DFCBF9E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_7DBF08B70880CD5DA0F00C269DFC4E70" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_DEF8D19FC6FE10CA0B500C269DFCBF9E" xlink:to="loc_evrg_WestarEnergyIncMember_7DBF08B70880CD5DA0F00C269DFC4E70" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_C7292CB1AAB454BF6F5F0C269DFC0396" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_DEF8D19FC6FE10CA0B500C269DFCBF9E" xlink:to="loc_evrg_KCPLMember_C7292CB1AAB454BF6F5F0C269DFC0396" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_5FFC0F6CE6F671FF54090C269DFDCDA6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_5FFC0F6CE6F671FF54090C269DFDCDA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_AB81555375F08949D71F0C269DFDFED9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_AB81555375F08949D71F0C269DFDFED9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_CDDA3AB371BEA3D91FC70C269DFD27D2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_CDDA3AB371BEA3D91FC70C269DFD27D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_9B6EC234919366C7C6C30C269DFE0177" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_9B6EC234919366C7C6C30C269DFE0177" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant_90FDEACEB10AEB33F4900C269DFEA125" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant_90FDEACEB10AEB33F4900C269DFEA125" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_4E05627402B1E40EA85A0C269DFEBB9F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_4E05627402B1E40EA85A0C269DFEBB9F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_FA9107A4F52FA83AA2300C269DFE52F5" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_FA9107A4F52FA83AA2300C269DFE52F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_90F8DFEAEE4D7D44CAE80C269DFE9104" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_90F8DFEAEE4D7D44CAE80C269DFE9104" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_71CE797B2C4F53214CD00C269DFFBDDD" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsBenefitObligation_71CE797B2C4F53214CD00C269DFFBDDD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation_3FEBE82B98E861587A320C269DFF8B9D" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsBenefitObligation_3FEBE82B98E861587A320C269DFF8B9D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanOtherChanges" xlink:label="loc_us-gaap_DefinedBenefitPlanOtherChanges_4AA3D6E3C204700CA6FA0C269DFFF5E5" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_3D772B038A290EBFF3CA0C269DFD14D9" xlink:to="loc_us-gaap_DefinedBenefitPlanOtherChanges_4AA3D6E3C204700CA6FA0C269DFFF5E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_484AE7EFC3B5380E6A2B0C269DFF94EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_484AE7EFC3B5380E6A2B0C269DFF94EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_34A11C40CAD3BC80BE130C269E00CF3B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_34A11C40CAD3BC80BE130C269E00CF3B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanContributionsByEmployerAndParticipants" xlink:label="loc_evrg_DefinedBenefitPlanContributionsByEmployerAndParticipants_1E64C0BB6219A39482B90C269E0084DB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:to="loc_evrg_DefinedBenefitPlanContributionsByEmployerAndParticipants_1E64C0BB6219A39482B90C269E0084DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_8957CFBD965E33343A030C269E006758" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_8957CFBD965E33343A030C269E006758" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_04726BC24D1CD08A6A850C269E05AAB0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_04726BC24D1CD08A6A850C269E05AAB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsPlanAssets_F2371E61E707CE4C2EA30C269E06BEF5" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:to="loc_us-gaap_DefinedBenefitPlanBusinessCombinationsAndAcquisitionsPlanAssets_F2371E61E707CE4C2EA30C269E06BEF5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanPlanAssetsOther" xlink:label="loc_evrg_DefinedBenefitPlanPlanAssetsOther_9FCBD5147B849100906B0C269E06FF25" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_BC431B2569C957F777B30C269DFF7DD2" xlink:to="loc_evrg_DefinedBenefitPlanPlanAssetsOther_9FCBD5147B849100906B0C269E06FF25" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_B541F81026AD2BC4C32F0C269E06F8A9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_B541F81026AD2BC4C32F0C269E06F8A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_ED73135DD8B7954945740C269E06077E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_ED73135DD8B7954945740C269E06077E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_EF4D5940F1D21A04442D0C269E070895" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_ED73135DD8B7954945740C269E06077E" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_EF4D5940F1D21A04442D0C269E070895" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesCurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesCurrent_872EA055FF68996702F20C269E07196B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_ED73135DD8B7954945740C269E06077E" xlink:to="loc_us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesCurrent_872EA055FF68996702F20C269E07196B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent_774DA50DFCAF97FB0AC50C269E071E95" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_ED73135DD8B7954945740C269E06077E" xlink:to="loc_us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent_774DA50DFCAF97FB0AC50C269E071E95" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanAmountsRecognizedInBalanceSheetBeforeRegulatoryTreatment" xlink:label="loc_evrg_DefinedBenefitPlanAmountsRecognizedInBalanceSheetBeforeRegulatoryTreatment_3DC3FCE3C4E8E8E90AE60C269E077E7A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_ED73135DD8B7954945740C269E06077E" xlink:to="loc_evrg_DefinedBenefitPlanAmountsRecognizedInBalanceSheetBeforeRegulatoryTreatment_3DC3FCE3C4E8E8E90AE60C269E077E7A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanAmountRecognizedInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiability" xlink:label="loc_evrg_DefinedBenefitPlanAmountRecognizedInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiability_994B71F43840477DDC190C269E071E0D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_ED73135DD8B7954945740C269E06077E" xlink:to="loc_evrg_DefinedBenefitPlanAmountRecognizedInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiability_994B71F43840477DDC190C269E071E0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_064143EE569D8FD089C30C269E072B07" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_ED73135DD8B7954945740C269E06077E" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_064143EE569D8FD089C30C269E072B07" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmountsInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNotYetRecognizedAsAComponentOfNetPeriodicBenefitCostAbstract" xlink:label="loc_evrg_AmountsInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNotYetRecognizedAsAComponentOfNetPeriodicBenefitCostAbstract_91534975ED9D178D127D0C269E08A211" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_evrg_AmountsInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNotYetRecognizedAsAComponentOfNetPeriodicBenefitCostAbstract_91534975ED9D178D127D0C269E08A211" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNetGainsLossesBeforeTax" xlink:label="loc_evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNetGainsLossesBeforeTax_8BD0127DA3E5E1FD6AF60C269E08EA88" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AmountsInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNotYetRecognizedAsAComponentOfNetPeriodicBenefitCostAbstract_91534975ED9D178D127D0C269E08A211" xlink:to="loc_evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNetGainsLossesBeforeTax_8BD0127DA3E5E1FD6AF60C269E08EA88" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNetPriorServiceCostCreditBeforeTax" xlink:label="loc_evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNetPriorServiceCostCreditBeforeTax_A38CA25885064547FB940C269E08B5FE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AmountsInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNotYetRecognizedAsAComponentOfNetPeriodicBenefitCostAbstract_91534975ED9D178D127D0C269E08A211" xlink:to="loc_evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNetPriorServiceCostCreditBeforeTax_A38CA25885064547FB940C269E08B5FE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityOtherBeforeTax" xlink:label="loc_evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityOtherBeforeTax_8F8885D6C827426C8FB50C269E08ABA0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_AmountsInAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityNotYetRecognizedAsAComponentOfNetPeriodicBenefitCostAbstract_91534975ED9D178D127D0C269E08A211" xlink:to="loc_evrg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOrRegulatoryAssetLiabilityOtherBeforeTax_8F8885D6C827426C8FB50C269E08ABA0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_UnfundedAccumulatedBenefitObligationForNonQualifiedPlans" xlink:label="loc_evrg_UnfundedAccumulatedBenefitObligationForNonQualifiedPlans_C4BEC5B9BE57F0EEA1E00C269E09C67A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_evrg_UnfundedAccumulatedBenefitObligationForNonQualifiedPlans_C4BEC5B9BE57F0EEA1E00C269E09C67A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SegregatedAssetsForNonQualifiedBenefitPlans" xlink:label="loc_evrg_SegregatedAssetsForNonQualifiedBenefitPlans_6932FB37F423640179240C269E0996D3" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_evrg_SegregatedAssetsForNonQualifiedBenefitPlans_6932FB37F423640179240C269E0996D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_68E98F80AF7D7F0278E10C269E0A0E47" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_68E98F80AF7D7F0278E10C269E0A0E47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_DE7F9FFCA5D4640338300C269E0AE9EB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_DE7F9FFCA5D4640338300C269E0AE9EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_DD35150BA4910DCAB2050C269E0A57CC" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_DD35150BA4910DCAB2050C269E0A57CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_F8DCC1D069244ECDEEA60C269E0A62FA" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_F8DCC1D069244ECDEEA60C269E0A62FA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetperiodbenefitcostsbeforeregulatoryadjustmentAndIntercompanyAllocations" xlink:label="loc_evrg_NetperiodbenefitcostsbeforeregulatoryadjustmentAndIntercompanyAllocations_CF15C615D0CF774C57C60C269E0AFB3F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:to="loc_evrg_NetperiodbenefitcostsbeforeregulatoryadjustmentAndIntercompanyAllocations_CF15C615D0CF774C57C60C269E0AFB3F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanRegulatoryAdjustment" xlink:label="loc_evrg_DefinedBenefitPlanRegulatoryAdjustment_FB387B1BEF2E75EA95600C269E0A3F0F" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:to="loc_evrg_DefinedBenefitPlanRegulatoryAdjustment_FB387B1BEF2E75EA95600C269E0A3F0F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlansIntercompanyAllocations" xlink:label="loc_evrg_DefinedBenefitPlansIntercompanyAllocations_2637CBC16817BC14EAA30C269E0BE367" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:to="loc_evrg_DefinedBenefitPlansIntercompanyAllocations_2637CBC16817BC14EAA30C269E0BE367" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_5B4E7C28D3C56FCF3F2F0C269E0B427C" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_6414F08E22FA5CBD37030C269E09C1A1" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_5B4E7C28D3C56FCF3F2F0C269E0B427C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract" xlink:label="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodbeforeTax" xlink:label="loc_evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodbeforeTax_026BD39A48CBA0321E120C269E0B8E79" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:to="loc_evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodbeforeTax_026BD39A48CBA0321E120C269E0B8E79" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityReclassificationAdjustmentfromAOCIPensionandOtherPostretirementBenefitPlansforNetGainLossbeforeTax" xlink:label="loc_evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityReclassificationAdjustmentfromAOCIPensionandOtherPostretirementBenefitPlansforNetGainLossbeforeTax_6E6890BC5F7FB6C05BD10C269E0B384B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:to="loc_evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityReclassificationAdjustmentfromAOCIPensionandOtherPostretirementBenefitPlansforNetGainLossbeforeTax_6E6890BC5F7FB6C05BD10C269E0B384B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherComprehensiveIncomeLossorRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansNetPriorServiceCostCreditArisingDuringPeriodbeforeTax" xlink:label="loc_evrg_OtherComprehensiveIncomeLossorRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansNetPriorServiceCostCreditArisingDuringPeriodbeforeTax_8DFF9A18C9D8742CD8070C269E0BF218" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:to="loc_evrg_OtherComprehensiveIncomeLossorRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansNetPriorServiceCostCreditArisingDuringPeriodbeforeTax_8DFF9A18C9D8742CD8070C269E0BF218" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherComprehensiveIncomeLossAmortizationAdjustmentfromAOCIorRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansforNetPriorServiceCostCreditbeforeTax" xlink:label="loc_evrg_OtherComprehensiveIncomeLossAmortizationAdjustmentfromAOCIorRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansforNetPriorServiceCostCreditbeforeTax_62EE82ACA31D3F3F2C870C269E0C538C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:to="loc_evrg_OtherComprehensiveIncomeLossAmortizationAdjustmentfromAOCIorRegulatoryAssetLiabilityPensionandOtherPostretirementBenefitPlansforNetPriorServiceCostCreditbeforeTax_62EE82ACA31D3F3F2C870C269E0C538C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityPensionAndOtherPostretirementBenefitPlansOtherRegulatoryActivity" xlink:label="loc_evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityPensionAndOtherPostretirementBenefitPlansOtherRegulatoryActivity_EE99489819BBE0BD4E500C269E0C9F0C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:to="loc_evrg_OtherComprehensiveIncomeLossOrRegulatoryAssetLiabilityPensionAndOtherPostretirementBenefitPlansOtherRegulatoryActivity_EE99489819BBE0BD4E500C269E0C9F0C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TotalRecognizedInOtherComprehensiveIncomeOrRegulatoryAssetLiability" xlink:label="loc_evrg_TotalRecognizedInOtherComprehensiveIncomeOrRegulatoryAssetLiability_7B7ADB02FB64EF7099500C269E0C581C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:to="loc_evrg_TotalRecognizedInOtherComprehensiveIncomeOrRegulatoryAssetLiability_7B7ADB02FB64EF7099500C269E0C581C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TotalRecognizedInNetPeriodicBenefitCostsAndOtherComprehensiveIncomeOrRegulatoryAssetLiability" xlink:label="loc_evrg_TotalRecognizedInNetPeriodicBenefitCostsAndOtherComprehensiveIncomeOrRegulatoryAssetLiability_CB5A5329CBC8EA3168BF0C269E0C183A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeRegulatoryAssetsLiabilitiesAbstract_27F0CD97529FD0BD22740C269E0B3476" xlink:to="loc_evrg_TotalRecognizedInNetPeriodicBenefitCostsAndOtherComprehensiveIncomeOrRegulatoryAssetLiability_CB5A5329CBC8EA3168BF0C269E0C183A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostFromAOCIOrRegulatoryAsset" xlink:label="loc_evrg_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostFromAOCIOrRegulatoryAsset_4028B2AA0F80D89659680C269E0C0C8D" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_evrg_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostFromAOCIOrRegulatoryAsset_4028B2AA0F80D89659680C269E0C0C8D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanFutureAmortizationOfGainLossFromAOCIOrRegulatoryAsset" xlink:label="loc_evrg_DefinedBenefitPlanFutureAmortizationOfGainLossFromAOCIOrRegulatoryAsset_59054227F81F644B70340C269E0C869F" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_evrg_DefinedBenefitPlanFutureAmortizationOfGainLossFromAOCIOrRegulatoryAsset_59054227F81F644B70340C269E0C869F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_07C9B2CA49E108CE66240C269E0DA436" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_07C9B2CA49E108CE66240C269E0DA436" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAbstract_00432C440F12E235C33E0C269E0DA7CD" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAbstract_00432C440F12E235C33E0C269E0DA7CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation_C604CDAC7734FAAB5A970C269E0D81D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAbstract_00432C440F12E235C33E0C269E0DA7CD" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation_C604CDAC7734FAAB5A970C269E0D81D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_AFD75E7E76696D94C0D50C269E13B364" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAbstract_00432C440F12E235C33E0C269E0DA7CD" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_AFD75E7E76696D94C0D50C269E13B364" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_495D992816C0E3204D0B0C269E133F84" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_495D992816C0E3204D0B0C269E133F84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_0F4F0311830F794950190C269E13F897" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_495D992816C0E3204D0B0C269E133F84" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_0F4F0311830F794950190C269E13F897" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_B480B989E7589D49EBBD0C269E139C52" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_495D992816C0E3204D0B0C269E133F84" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_B480B989E7589D49EBBD0C269E139C52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_073FC01844BE3C91E8A90C269E136D34" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_073FC01844BE3C91E8A90C269E136D34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_D38596B29916EA4EAC690C269E13B85B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_073FC01844BE3C91E8A90C269E136D34" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_D38596B29916EA4EAC690C269E13B85B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_EBB50663B8F74E8EB5850C269E143EC2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_073FC01844BE3C91E8A90C269E136D34" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_EBB50663B8F74E8EB5850C269E143EC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_9AEA80825D74D570718F0C269E145C6D" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_9AEA80825D74D570718F0C269E145C6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_00FC1D69B16A0E2A7EA10C269E141605" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_9AEA80825D74D570718F0C269E145C6D" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_00FC1D69B16A0E2A7EA10C269E141605" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_9C5FAECE4BC0B71A443C0C269E143850" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_9AEA80825D74D570718F0C269E145C6D" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_9C5FAECE4BC0B71A443C0C269E143850" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_4EF2CF0ED25EE8F2B82F0C269E15C446" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_9AEA80825D74D570718F0C269E145C6D" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_4EF2CF0ED25EE8F2B82F0C269E15C446" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_F6C801F49F1D4C8094CB0C269E157E09" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_F6C801F49F1D4C8094CB0C269E157E09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_7366C6FF2410A57A2DA30C269E15BC73" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_7366C6FF2410A57A2DA30C269E15BC73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_DDE5D7DA3F4A81CE20EA0C269E1505F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_7366C6FF2410A57A2DA30C269E15BC73" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_DDE5D7DA3F4A81CE20EA0C269E1505F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_85317513462E0D8847D60C269E153E51" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_7366C6FF2410A57A2DA30C269E15BC73" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_85317513462E0D8847D60C269E153E51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_9BD9EF43CDA6C203481F0C269E16E169" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_7366C6FF2410A57A2DA30C269E15BC73" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_9BD9EF43CDA6C203481F0C269E16E169" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_0CCCFCA3A4EE144233920C269E16D8C9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_7366C6FF2410A57A2DA30C269E15BC73" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_0CCCFCA3A4EE144233920C269E16D8C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_CDF67D7040CD7FB5E5CF0C269E1668C1" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_7366C6FF2410A57A2DA30C269E15BC73" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_CDF67D7040CD7FB5E5CF0C269E1668C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_F18F6DB8FC22827849750C269E171DC6" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_7366C6FF2410A57A2DA30C269E15BC73" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_F18F6DB8FC22827849750C269E171DC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract_CC8A5BFD5013972B1D850C269E175987" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract_CC8A5BFD5013972B1D850C269E175987" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_2EEA1F74C71BD8950C140C269E17454E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract_CC8A5BFD5013972B1D850C269E175987" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_2EEA1F74C71BD8950C140C269E17454E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_763C54497534D7F9DB490C269E17E8CD" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_763C54497534D7F9DB490C269E17E8CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_821B27A3081FA0E5D2790C269E172113" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_763C54497534D7F9DB490C269E17E8CD" xlink:to="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_821B27A3081FA0E5D2790C269E172113" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1" xlink:label="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_D78FFA3687E811DBE08E0C269E185B04" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_763C54497534D7F9DB490C269E17E8CD" xlink:to="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_D78FFA3687E811DBE08E0C269E185B04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate" xlink:label="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_4AE2D50EB79643D5A3750C269E1815C1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract_763C54497534D7F9DB490C269E17E8CD" xlink:to="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_4AE2D50EB79643D5A3750C269E1815C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_653D082DAB49096F4E180C269E184CE0" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_653D082DAB49096F4E180C269E184CE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_90F82C9ED63E8740886E0C269E18D42E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_653D082DAB49096F4E180C269E184CE0" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_90F82C9ED63E8740886E0C269E18D42E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_CE97B12CBC00CD48B2380C269E183791" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_653D082DAB49096F4E180C269E184CE0" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_CE97B12CBC00CD48B2380C269E183791" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1_9CA8D121819904A689220C269E1933D2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_653D082DAB49096F4E180C269E184CE0" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1_9CA8D121819904A689220C269E1933D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1_4129159181BEBC7B0E0C0C269E19C482" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesAbstract_653D082DAB49096F4E180C269E184CE0" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1_4129159181BEBC7B0E0C0C269E19C482" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract" xlink:label="loc_us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract_F4A3385F69701724F9840C269E19CF1C" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_217CD0E28376CBEAF26A0C269DFD87C5" xlink:to="loc_us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract_F4A3385F69701724F9840C269E19CF1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_296C4B69B62D86915D500C269E197D2A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract_F4A3385F69701724F9840C269E19CF1C" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_296C4B69B62D86915D500C269E197D2A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/PensionPlansAndOtherEmployeeBenefitsPensionPlansFairValueDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9731080C5838C618CB45EF597380B4E7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_358AA7792538CB031B35EF5973716BEC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9731080C5838C618CB45EF597380B4E7" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_358AA7792538CB031B35EF5973716BEC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_F9A52E15341A0B523AC3EF5973728E7F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_358AA7792538CB031B35EF5973716BEC" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_F9A52E15341A0B523AC3EF5973728E7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_F5FB84125BA0DA21ADE3EF5973776788_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F9A52E15341A0B523AC3EF5973728E7F" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_F5FB84125BA0DA21ADE3EF5973776788_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_F5FB84125BA0DA21ADE3EF5973776788" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F9A52E15341A0B523AC3EF5973728E7F" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_F5FB84125BA0DA21ADE3EF5973776788" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_D7CCF08B2EB6E63514F6EF597377D50C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_F5FB84125BA0DA21ADE3EF5973776788" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_D7CCF08B2EB6E63514F6EF597377D50C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_53184B5668661D947726EF597378CEC6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_F5FB84125BA0DA21ADE3EF5973776788" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_53184B5668661D947726EF597378CEC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E84B5CA2E827C473E0CDEF5973782054" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_358AA7792538CB031B35EF5973716BEC" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E84B5CA2E827C473E0CDEF5973782054" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9C7F9214CCA070699631EF597378BD5E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E84B5CA2E827C473E0CDEF5973782054" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9C7F9214CCA070699631EF597378BD5E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9C7F9214CCA070699631EF597378BD5E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E84B5CA2E827C473E0CDEF5973782054" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9C7F9214CCA070699631EF597378BD5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_EE772E65A6470BE9678BEF5973785BCE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9C7F9214CCA070699631EF597378BD5E" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_EE772E65A6470BE9678BEF5973785BCE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_F79FC22F78FB70744670EF5973796191" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9C7F9214CCA070699631EF597378BD5E" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_F79FC22F78FB70744670EF5973796191" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_9F09D6061B66D3E93CF9EF597379BF37" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9C7F9214CCA070699631EF597378BD5E" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_9F09D6061B66D3E93CF9EF597379BF37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_13C3BA49858CA4B35FF2EF5973797625" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9C7F9214CCA070699631EF597378BD5E" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_13C3BA49858CA4B35FF2EF5973797625" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_0B2AEC3FB27A288CEA8BEF59737A57E9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_358AA7792538CB031B35EF5973716BEC" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_0B2AEC3FB27A288CEA8BEF59737A57E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_0B2AEC3FB27A288CEA8BEF59737A57E9" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_0B2AEC3FB27A288CEA8BEF59737A57E9" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesUsMember" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesUsMember_381A53856E6FA0394D71EF59737A0FF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesUsMember_381A53856E6FA0394D71EF59737A0FF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember_59166B0A916B4737AB3AEF59737A34B3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesNonUsMember_59166B0A916B4737AB3AEF59737A34B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_79662A58033C0DEE15C1EF59737BBD12" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_79662A58033C0DEE15C1EF59737BBD12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_70C92F1B4697FF685A82EF59737B952A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_70C92F1B4697FF685A82EF59737B952A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_09A7E736373D0AC52A58EF59737B4799" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_09A7E736373D0AC52A58EF59737B4799" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanRealEstateMember" xlink:label="loc_us-gaap_DefinedBenefitPlanRealEstateMember_48596974145C9F504F64EF59737BE128" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_DefinedBenefitPlanRealEstateMember_48596974145C9F504F64EF59737BE128" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalancedFundsMember" xlink:label="loc_us-gaap_BalancedFundsMember_C587519B6CF17AB4A9FDEF59737BFD82" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_BalancedFundsMember_C587519B6CF17AB4A9FDEF59737BFD82" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AlternativeInvestmentFundsMember" xlink:label="loc_evrg_AlternativeInvestmentFundsMember_D1214AB3750D6E3DEA30EF59737B8973" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_evrg_AlternativeInvestmentFundsMember_D1214AB3750D6E3DEA30EF59737B8973" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_60379A58D891D5DF792DEF59737B13E4" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_60379A58D891D5DF792DEF59737B13E4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DefinedBenefitPlanOtherMember" xlink:label="loc_evrg_DefinedBenefitPlanOtherMember_DA14029B76C04382FBB4EF59737C9ECD" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_evrg_DefinedBenefitPlanOtherMember_DA14029B76C04382FBB4EF59737C9ECD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_5C9F57AB8483EFD0A849EF59737CC880" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_5C9F57AB8483EFD0A849EF59737CC880" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FixedIncomeFundsMember" xlink:label="loc_us-gaap_FixedIncomeFundsMember_3DF646BB79B8D71D88F1EF59737CEAC8" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_9FF758CA1B698CD25A0BEF59737A35CC" xlink:to="loc_us-gaap_FixedIncomeFundsMember_3DF646BB79B8D71D88F1EF59737CEAC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_C9F26EECF6BEAC254176EF59737C793F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_358AA7792538CB031B35EF5973716BEC" xlink:to="loc_us-gaap_InvestmentTypeAxis_C9F26EECF6BEAC254176EF59737C793F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_C9F26EECF6BEAC254176EF59737C793F" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_C9F26EECF6BEAC254176EF59737C793F" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TradedMutualFundsMember" xlink:label="loc_evrg_TradedMutualFundsMember_576E8A305C18A3E712B4EF59737DEF1C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_evrg_TradedMutualFundsMember_576E8A305C18A3E712B4EF59737DEF1C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InstitutionalCommonCollectiveTrustFundsMember" xlink:label="loc_evrg_InstitutionalCommonCollectiveTrustFundsMember_D6F860833D1DA31789BEEF59737DCA8E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_evrg_InstitutionalCommonCollectiveTrustFundsMember_D6F860833D1DA31789BEEF59737DCA8E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_CommonStockandExchangeTradedFundsMember" xlink:label="loc_evrg_CommonStockandExchangeTradedFundsMember_74774FDA91A2F59BEE69EF59737DC127" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_evrg_CommonStockandExchangeTradedFundsMember_74774FDA91A2F59BEE69EF59737DC127" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmericanDepositoryReceiptsGlobalDepositoryReceiptsAndOrdinarySharesMember" xlink:label="loc_evrg_AmericanDepositoryReceiptsGlobalDepositoryReceiptsAndOrdinarySharesMember_A5F268C6A3ED390B153DEF59737D8F54" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_evrg_AmericanDepositoryReceiptsGlobalDepositoryReceiptsAndOrdinarySharesMember_A5F268C6A3ED390B153DEF59737D8F54" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RealEstateInvestmentTrustMember" xlink:label="loc_evrg_RealEstateInvestmentTrustMember_897F35A48BCEC37A8724EF59737D1FCA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_evrg_RealEstateInvestmentTrustMember_897F35A48BCEC37A8724EF59737D1FCA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LimitedPartnershipsMember" xlink:label="loc_evrg_LimitedPartnershipsMember_83A0A3E23BF42897924BEF59737EE32D" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_evrg_LimitedPartnershipsMember_83A0A3E23BF42897924BEF59737EE32D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityFundsMember" xlink:label="loc_us-gaap_EquityFundsMember_90EFA56FBFD1453B38C7EF59737EE39A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_us-gaap_EquityFundsMember_90EFA56FBFD1453B38C7EF59737EE39A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_C851E7425F0AA349E54DEF59737E9B57" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_C851E7425F0AA349E54DEF59737E9B57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_MortgageBackedSecuritiesMember_311C7642439210AAD689EF59737E6C4E" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_us-gaap_MortgageBackedSecuritiesMember_311C7642439210AAD689EF59737E6C4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_DD44FE9D5FD30097EF29EF59737E8C01" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_DD44FE9D5FD30097EF29EF59737E8C01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FixedIncomeFundsMember" xlink:label="loc_us-gaap_FixedIncomeFundsMember_8D6F127C5D742C78D416EF59737EF8DF" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_78C42BCA4E83A98695ABEF59737D5CB1" xlink:to="loc_us-gaap_FixedIncomeFundsMember_8D6F127C5D742C78D416EF59737EF8DF" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_73C815588E2DFA66BB8BEF59737FFB94" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_358AA7792538CB031B35EF5973716BEC" xlink:to="loc_dei_LegalEntityAxis_73C815588E2DFA66BB8BEF59737FFB94" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8E220F530DB0982C7599EF59737F8403_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_73C815588E2DFA66BB8BEF59737FFB94" xlink:to="loc_dei_EntityDomain_8E220F530DB0982C7599EF59737F8403_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8E220F530DB0982C7599EF59737F8403" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_73C815588E2DFA66BB8BEF59737FFB94" xlink:to="loc_dei_EntityDomain_8E220F530DB0982C7599EF59737F8403" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_A11B8408FB6BA73224F9EF59737F9590" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8E220F530DB0982C7599EF59737F8403" xlink:to="loc_evrg_KCPLMember_A11B8408FB6BA73224F9EF59737F9590" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_EBA11064BD4FEFD308A3EF59737FF492" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8E220F530DB0982C7599EF59737F8403" xlink:to="loc_evrg_WestarEnergyIncMember_EBA11064BD4FEFD308A3EF59737FF492" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount" xlink:label="loc_us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount_33941950AD671AF1C315EF5973804BFC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9731080C5838C618CB45EF597380B4E7" xlink:to="loc_us-gaap_FairValueAssetsLevel2ToLevel1TransfersAmount_33941950AD671AF1C315EF5973804BFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_FE862BE04EA9F5735297EF5973803DC1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9731080C5838C618CB45EF597380B4E7" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_FE862BE04EA9F5735297EF5973803DC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_FD4D7D68779A37537D10EF5973808762" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9731080C5838C618CB45EF597380B4E7" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_FD4D7D68779A37537D10EF5973808762" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AlternativeInvestment" xlink:label="loc_us-gaap_AlternativeInvestment_FEE084A8306AAD767434EF597381CB04" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9731080C5838C618CB45EF597380B4E7" xlink:to="loc_us-gaap_AlternativeInvestment_FEE084A8306AAD767434EF597381CB04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_C04B5325C0FE4613CEECEF59738186A3" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9731080C5838C618CB45EF597380B4E7" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_C04B5325C0FE4613CEECEF59738186A3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ActualReturnOnPlanAssetsAbstract" xlink:label="loc_evrg_ActualReturnOnPlanAssetsAbstract_5FEA4DB164D7D3158043EF597381DFCB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_C04B5325C0FE4613CEECEF59738186A3" xlink:to="loc_evrg_ActualReturnOnPlanAssetsAbstract_5FEA4DB164D7D3158043EF597381DFCB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_58609AB39FE1066B141AEF597381343E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_ActualReturnOnPlanAssetsAbstract_5FEA4DB164D7D3158043EF597381DFCB" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_58609AB39FE1066B141AEF597381343E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_F68166B0A4C596E702EAEF59738194D0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_ActualReturnOnPlanAssetsAbstract_5FEA4DB164D7D3158043EF597381DFCB" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_F68166B0A4C596E702EAEF59738194D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_04781A362EDED486BB5CEF5973876B92" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_ActualReturnOnPlanAssetsAbstract_5FEA4DB164D7D3158043EF597381DFCB" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_04781A362EDED486BB5CEF5973876B92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_B2F7BA94DE7DBD0B9910EF597387FEBF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_ActualReturnOnPlanAssetsAbstract_5FEA4DB164D7D3158043EF597381DFCB" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_B2F7BA94DE7DBD0B9910EF597387FEBF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FairValueAssetsLevel2ToAlternativeInvestmentsTransfersAmount" xlink:label="loc_evrg_FairValueAssetsLevel2ToAlternativeInvestmentsTransfersAmount_2B564A2CA30C98BBBE86EF597387F65C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9731080C5838C618CB45EF597380B4E7" xlink:to="loc_evrg_FairValueAssetsLevel2ToAlternativeInvestmentsTransfersAmount_2B564A2CA30C98BBBE86EF597387F65C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/PensionPlansAndOtherEmployeeBenefitsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/PropertyPlantEquipmentPropertyPlantAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_61BBB1C21FB549587DEB08E971B32EDA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_61BBB1C21FB549587DEB08E971B32EDA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_A013E354686BE10F389D08E971B3A51E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_61BBB1C21FB549587DEB08E971B32EDA" xlink:to="loc_dei_LegalEntityAxis_A013E354686BE10F389D08E971B3A51E" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_2AB056E08425CD5133FC08E971B35611_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_A013E354686BE10F389D08E971B3A51E" xlink:to="loc_dei_EntityDomain_2AB056E08425CD5133FC08E971B35611_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_2AB056E08425CD5133FC08E971B35611" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_A013E354686BE10F389D08E971B3A51E" xlink:to="loc_dei_EntityDomain_2AB056E08425CD5133FC08E971B35611" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_530A24CE68BFD42A07FB08E971B4A347" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2AB056E08425CD5133FC08E971B35611" xlink:to="loc_evrg_WestarEnergyIncMember_530A24CE68BFD42A07FB08E971B4A347" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_7AF5FDA4BF848775847908E971B4BF64" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2AB056E08425CD5133FC08E971B35611" xlink:to="loc_evrg_KCPLMember_7AF5FDA4BF848775847908E971B4BF64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8C6F508405DE8D038E9508E971B4E66C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_61BBB1C21FB549587DEB08E971B32EDA" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8C6F508405DE8D038E9508E971B4E66C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0AB140AE6B375C288FCD08E971B4AA03_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8C6F508405DE8D038E9508E971B4E66C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0AB140AE6B375C288FCD08E971B4AA03_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0AB140AE6B375C288FCD08E971B4AA03" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8C6F508405DE8D038E9508E971B4E66C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0AB140AE6B375C288FCD08E971B4AA03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_A771FA44B88638E19E1808E971B5E6D8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_61BBB1C21FB549587DEB08E971B32EDA" xlink:to="loc_srt_RangeAxis_A771FA44B88638E19E1808E971B5E6D8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_F9D6E8A286BA0AE4B38A08E971B5F647_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_A771FA44B88638E19E1808E971B5E6D8" xlink:to="loc_srt_RangeMember_F9D6E8A286BA0AE4B38A08E971B5F647_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_F9D6E8A286BA0AE4B38A08E971B5F647" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_A771FA44B88638E19E1808E971B5E6D8" xlink:to="loc_srt_RangeMember_F9D6E8A286BA0AE4B38A08E971B5F647" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9F7BF24254F5F8ED191208E971B56882" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_61BBB1C21FB549587DEB08E971B32EDA" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9F7BF24254F5F8ED191208E971B56882" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_8C454CF5D9FC207C61A508E971B5999C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9F7BF24254F5F8ED191208E971B56882" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_8C454CF5D9FC207C61A508E971B5999C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_8C454CF5D9FC207C61A508E971B5999C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9F7BF24254F5F8ED191208E971B56882" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_8C454CF5D9FC207C61A508E971B5999C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_6196847D45608796DCA108E971B65BF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_8C454CF5D9FC207C61A508E971B5999C" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_6196847D45608796DCA108E971B65BF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_4FBBD311D781FEE6311908E971B6EF2F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_us-gaap_Depreciation_4FBBD311D781FEE6311908E971B6EF2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_7BE376AF0736A3E6C44308E971B646C1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_7BE376AF0736A3E6C44308E971B646C1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PropertyPlantAndEquipmentAdjustment" xlink:label="loc_evrg_PropertyPlantAndEquipmentAdjustment_3C98EC9C14C6C8E6C8A808E971B60EA2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_evrg_PropertyPlantAndEquipmentAdjustment_3C98EC9C14C6C8E6C8A808E971B60EA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_9AAC7A6F2AA625EC800408E971B74AF6" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_9AAC7A6F2AA625EC800408E971B74AF6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet" xlink:label="loc_evrg_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet_DD22CFA6524E8EE6D98208E971B73DEA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_evrg_PublicUtilitiesPropertyPlantAndEquipmentInServiceNet_DD22CFA6524E8EE6D98208E971B73DEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_DB969DC56571E3AF8F3908E971B7B8E1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_DB969DC56571E3AF8F3908E971B7B8E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NuclearFuelNetOfAmortization" xlink:label="loc_us-gaap_NuclearFuelNetOfAmortization_2EF56F9552DEDB6A476C08E971B7B5B9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_us-gaap_NuclearFuelNetOfAmortization_2EF56F9552DEDB6A476C08E971B7B5B9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PlantToBeRetiredNet" xlink:label="loc_evrg_PlantToBeRetiredNet_B4DC6150F87A7726974C08E971B7B4A4" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_evrg_PlantToBeRetiredNet_B4DC6150F87A7726974C08E971B7B4A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_1EAE54A6432150F43DB308E971B70864" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_1EAE54A6432150F43DB308E971B70864" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_Electricplantinservice" xlink:label="loc_evrg_Electricplantinservice_2696631A57438DC1B34A08E971B82036" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_evrg_Electricplantinservice_2696631A57438DC1B34A08E971B82036" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_F58777D7A2ED6FA595DA08E971B807CA" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_F58777D7A2ED6FA595DA08E971B807CA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_Plantinservice" xlink:label="loc_evrg_Plantinservice_7278000C1BB81CE8279208E971B84F34" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_DD52CD880D2602216A3A08E971B632E8" xlink:to="loc_evrg_Plantinservice_7278000C1BB81CE8279208E971B84F34" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/PropertyPlantEquipmentPropertyPlantAndEquipmentTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0BB8F0561CA772654B71EA558423C030" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0C9861D0D666AAF6E3FDEA5584226B7C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0BB8F0561CA772654B71EA558423C030" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0C9861D0D666AAF6E3FDEA5584226B7C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_A477DB254F31E7C5B99DEA5584228770" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0C9861D0D666AAF6E3FDEA5584226B7C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_A477DB254F31E7C5B99DEA5584228770" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_EECA712406C8775EBEA1EA5584229E3F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_A477DB254F31E7C5B99DEA5584228770" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_EECA712406C8775EBEA1EA5584229E3F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_EECA712406C8775EBEA1EA5584229E3F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_A477DB254F31E7C5B99DEA5584228770" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_EECA712406C8775EBEA1EA5584229E3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_D84FA3158EC3956CF52BEA55842332E2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0C9861D0D666AAF6E3FDEA5584226B7C" xlink:to="loc_srt_RangeAxis_D84FA3158EC3956CF52BEA55842332E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_6523245D309F8E2BD56FEA558423F72A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_D84FA3158EC3956CF52BEA55842332E2" xlink:to="loc_srt_RangeMember_6523245D309F8E2BD56FEA558423F72A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_6523245D309F8E2BD56FEA558423F72A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_D84FA3158EC3956CF52BEA55842332E2" xlink:to="loc_srt_RangeMember_6523245D309F8E2BD56FEA558423F72A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfPublicUtilityPropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfPublicUtilityPropertyPlantAndEquipmentTextBlock_3370B29C943A65F9ACC1EA558423DDD0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0BB8F0561CA772654B71EA558423C030" xlink:to="loc_us-gaap_ScheduleOfPublicUtilityPropertyPlantAndEquipmentTextBlock_3370B29C943A65F9ACC1EA558423DDD0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_B9A3C6D90BA84411FD2AEA5584249EBA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0BB8F0561CA772654B71EA558423C030" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_B9A3C6D90BA84411FD2AEA5584249EBA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_Property_Plant__Equipment_of_VIEsTableTextBlock" xlink:label="loc_evrg_Property_Plant__Equipment_of_VIEsTableTextBlock_31061CF37C417A3A879DEA55842422EF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0BB8F0561CA772654B71EA558423C030" xlink:to="loc_evrg_Property_Plant__Equipment_of_VIEsTableTextBlock_31061CF37C417A3A879DEA55842422EF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_Depreciation_ExpenseTableTextBlock" xlink:label="loc_evrg_Depreciation_ExpenseTableTextBlock_A80E0712182AFC51B22FEA558424A582" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0BB8F0561CA772654B71EA558423C030" xlink:to="loc_evrg_Depreciation_ExpenseTableTextBlock_A80E0712182AFC51B22FEA558424A582" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/PropertyPlantEquipmentPropertyPlantEquipment" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/QuarterlyOperatingResultsUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/QuarterlyOperatingResultsUnauditedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_1BD5E42DD7D469962745ED5259CF34EE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:to="loc_us-gaap_StatementTable_1BD5E42DD7D469962745ED5259CF34EE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1D62FA409A33211EC0FCED5259CFAAF9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1BD5E42DD7D469962745ED5259CF34EE" xlink:to="loc_dei_LegalEntityAxis_1D62FA409A33211EC0FCED5259CFAAF9" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_539593A0EACFE331C3D2ED5259CF0663_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1D62FA409A33211EC0FCED5259CFAAF9" xlink:to="loc_dei_EntityDomain_539593A0EACFE331C3D2ED5259CF0663_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_539593A0EACFE331C3D2ED5259CF0663" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1D62FA409A33211EC0FCED5259CFAAF9" xlink:to="loc_dei_EntityDomain_539593A0EACFE331C3D2ED5259CF0663" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_F93B73C06E533BA04E67ED5259CF1ABC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_539593A0EACFE331C3D2ED5259CF0663" xlink:to="loc_evrg_WestarEnergyIncMember_F93B73C06E533BA04E67ED5259CF1ABC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_734905D0DD75823CEF1FED5259D0A937" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_539593A0EACFE331C3D2ED5259CF0663" xlink:to="loc_evrg_KCPLMember_734905D0DD75823CEF1FED5259D0A937" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_C7084EF9E37F577DFE5AED5259D0D9A2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:to="loc_us-gaap_Revenues_C7084EF9E37F577DFE5AED5259D0D9A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_F4C32BBFB5C456B832C4ED5259D187F4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:to="loc_us-gaap_OperatingIncomeLoss_F4C32BBFB5C456B832C4ED5259D187F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_CE8516EA8F118549DCAAED5259D182FB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:to="loc_us-gaap_ProfitLoss_CE8516EA8F118549DCAAED5259D182FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_4FFEEF66A0DADA8B2F63ED5259D16F53" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:to="loc_us-gaap_NetIncomeLoss_4FFEEF66A0DADA8B2F63ED5259D16F53" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDiluted_010F60B9F57983E418D7ED5259D648B8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:to="loc_us-gaap_EarningsPerShareBasicAndDiluted_010F60B9F57983E418D7ED5259D648B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_3F0E63E76E7C9A042EE7ED5259D609AD" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:to="loc_us-gaap_EarningsPerShareBasic_3F0E63E76E7C9A042EE7ED5259D609AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_5F3A9AB03686104C911DED5259D750BB" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E1C9397FA0747C218003ED5259D0BDFD" xlink:to="loc_us-gaap_EarningsPerShareDiluted_5F3A9AB03686104C911DED5259D750BB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/QuarterlyOperatingResultsUnauditedTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RateMattersAndRegulation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RateMattersAndRegulationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresLineItems" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTable" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_2757A148A5F41C1B7F98F6A01C3A0214" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_2757A148A5F41C1B7F98F6A01C3A0214" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_6EA4978D8CB7E1261B4EF6A01C3A6CF4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_2757A148A5F41C1B7F98F6A01C3A0214" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_6EA4978D8CB7E1261B4EF6A01C3A6CF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_CF12B8881CB82BA77536F6A01C3AA3BC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_6EA4978D8CB7E1261B4EF6A01C3A6CF4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_CF12B8881CB82BA77536F6A01C3AA3BC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_CF12B8881CB82BA77536F6A01C3AA3BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_6EA4978D8CB7E1261B4EF6A01C3A6CF4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_CF12B8881CB82BA77536F6A01C3AA3BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_1723FAF2A1C63D35F6A9F6A01C3A56C9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_CF12B8881CB82BA77536F6A01C3AA3BC" xlink:to="loc_us-gaap_SubsequentEventMember_1723FAF2A1C63D35F6A9F6A01C3A56C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingAxis" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_97838BDDEAF1E8D87275F6A01C3BF01E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_2757A148A5F41C1B7F98F6A01C3A0214" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_97838BDDEAF1E8D87275F6A01C3BF01E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_DA494A70A684D792EF40F6A01C3B9B88_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_97838BDDEAF1E8D87275F6A01C3BF01E" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_DA494A70A684D792EF40F6A01C3B9B88_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_DA494A70A684D792EF40F6A01C3B9B88" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_97838BDDEAF1E8D87275F6A01C3BF01E" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_DA494A70A684D792EF40F6A01C3B9B88" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TransmissionDeliveryChargeMember" xlink:label="loc_evrg_TransmissionDeliveryChargeMember_E420AE23BC961F5137AFF6A01C3B86D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_DA494A70A684D792EF40F6A01C3B9B88" xlink:to="loc_evrg_TransmissionDeliveryChargeMember_E420AE23BC961F5137AFF6A01C3B86D4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_A2018RateCaseProceedingsMember" xlink:label="loc_evrg_A2018RateCaseProceedingsMember_C6D572F8DAC68318E597F6A01C3B18B0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_DA494A70A684D792EF40F6A01C3B9B88" xlink:to="loc_evrg_A2018RateCaseProceedingsMember_C6D572F8DAC68318E597F6A01C3B18B0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FERCProceedingsMember" xlink:label="loc_evrg_FERCProceedingsMember_01F115F19C0EAAD187D9F6A01C3C8B2D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_DA494A70A684D792EF40F6A01C3B9B88" xlink:to="loc_evrg_FERCProceedingsMember_01F115F19C0EAAD187D9F6A01C3C8B2D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FERC2019TFRProceedingMember" xlink:label="loc_evrg_FERC2019TFRProceedingMember_BABBAF8F1B05C8C93E52F6A01C3C61CF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_DA494A70A684D792EF40F6A01C3B9B88" xlink:to="loc_evrg_FERC2019TFRProceedingMember_BABBAF8F1B05C8C93E52F6A01C3C61CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_CBAE7B66704C233AD2A2F6A01C3CF4D1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_2757A148A5F41C1B7F98F6A01C3A0214" xlink:to="loc_srt_RangeAxis_CBAE7B66704C233AD2A2F6A01C3CF4D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_BCB1201F28AF4B9B38E4F6A01C3CDB49_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_CBAE7B66704C233AD2A2F6A01C3CF4D1" xlink:to="loc_srt_RangeMember_BCB1201F28AF4B9B38E4F6A01C3CDB49_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_BCB1201F28AF4B9B38E4F6A01C3CDB49" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_CBAE7B66704C233AD2A2F6A01C3CF4D1" xlink:to="loc_srt_RangeMember_BCB1201F28AF4B9B38E4F6A01C3CDB49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_D5514DEDDC9A7F36349FF6A01C3C10E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_BCB1201F28AF4B9B38E4F6A01C3CDB49" xlink:to="loc_srt_MaximumMember_D5514DEDDC9A7F36349FF6A01C3C10E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_3C536747892D3D6E1D95F6A01C3D421B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_BCB1201F28AF4B9B38E4F6A01C3CDB49" xlink:to="loc_srt_MinimumMember_3C536747892D3D6E1D95F6A01C3D421B" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_B799320C03868FC3FF7EF6A01C3D6593" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_2757A148A5F41C1B7F98F6A01C3A0214" xlink:to="loc_dei_LegalEntityAxis_B799320C03868FC3FF7EF6A01C3D6593" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_16D15383013CB3F2441EF6A01C3D3F39_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_B799320C03868FC3FF7EF6A01C3D6593" xlink:to="loc_dei_EntityDomain_16D15383013CB3F2441EF6A01C3D3F39_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_16D15383013CB3F2441EF6A01C3D3F39" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_B799320C03868FC3FF7EF6A01C3D6593" xlink:to="loc_dei_EntityDomain_16D15383013CB3F2441EF6A01C3D3F39" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_91FF8BFC0D3E07B4BAD7F6A01C3D1E12" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_16D15383013CB3F2441EF6A01C3D3F39" xlink:to="loc_evrg_WestarEnergyIncMember_91FF8BFC0D3E07B4BAD7F6A01C3D1E12" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_AD0B914782DA6E37084BF6A01C3E8B03" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_16D15383013CB3F2441EF6A01C3D3F39" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_AD0B914782DA6E37084BF6A01C3E8B03" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_F979A0C8A34F9F3DCBD0F6A01C3E54E9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_16D15383013CB3F2441EF6A01C3D3F39" xlink:to="loc_evrg_KCPLMember_F979A0C8A34F9F3DCBD0F6A01C3E54E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyAxis" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_1600FD57BAB23553B823F6A01C3E3DD5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_2757A148A5F41C1B7F98F6A01C3A0214" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_1600FD57BAB23553B823F6A01C3E3DD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_83409CC5736DA80F6AF0F6A01C3E1E2D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_1600FD57BAB23553B823F6A01C3E3DD5" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_83409CC5736DA80F6AF0F6A01C3E1E2D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_83409CC5736DA80F6AF0F6A01C3E1E2D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_1600FD57BAB23553B823F6A01C3E3DD5" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_83409CC5736DA80F6AF0F6A01C3E1E2D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MissouriPublicServiceCommissionMember" xlink:label="loc_evrg_MissouriPublicServiceCommissionMember_BC09CB6AD988E6E9138CF6A01C3EB82C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_83409CC5736DA80F6AF0F6A01C3E1E2D" xlink:to="loc_evrg_MissouriPublicServiceCommissionMember_BC09CB6AD988E6E9138CF6A01C3EB82C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasCorporationCommissionMember" xlink:label="loc_evrg_KansasCorporationCommissionMember_D3A16619DA684A0B3620F6A01C3FC0CD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_83409CC5736DA80F6AF0F6A01C3E1E2D" xlink:to="loc_evrg_KansasCorporationCommissionMember_D3A16619DA684A0B3620F6A01C3FC0CD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FederalEnergyRegulatoryCommissionMember" xlink:label="loc_evrg_FederalEnergyRegulatoryCommissionMember_0A1FF474B8E6ED0DBC71F6A01C3FD3BF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_83409CC5736DA80F6AF0F6A01C3E1E2D" xlink:to="loc_evrg_FederalEnergyRegulatoryCommissionMember_0A1FF474B8E6ED0DBC71F6A01C3FD3BF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAnticipatedAmount" xlink:label="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAnticipatedAmount_94297B938873E274D3E3F6A01C3F7FCB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAnticipatedAmount_94297B938873E274D3E3F6A01C3F7FCB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount" xlink:label="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount_F6BC67931924DD1C2E55F6A01C3F53F7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount_F6BC67931924DD1C2E55F6A01C3F53F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount" xlink:label="loc_us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount_191EAFB9E9E70888A593F6A01C40401F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount_191EAFB9E9E70888A593F6A01C40401F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedAmount" xlink:label="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedAmount_D3A1FBAFB0147E48BB93F6A01C40AF66" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedAmount_D3A1FBAFB0147E48BB93F6A01C40AF66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage" xlink:label="loc_us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage_9752D838CC1519E8C839F6A01C4029B7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage_9752D838CC1519E8C839F6A01C4029B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage" xlink:label="loc_us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_0AF85764629C93BCFB42F6A01C401FA4" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_0AF85764629C93BCFB42F6A01C401FA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage" xlink:label="loc_us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage_6C6B82034B385C75F950F6A01C400C2C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage_6C6B82034B385C75F950F6A01C400C2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesApprovedEquityCapitalStructurePercentage" xlink:label="loc_us-gaap_PublicUtilitiesApprovedEquityCapitalStructurePercentage_B58C9E9F5C8458BFB673F6A01C40B60A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_PublicUtilitiesApprovedEquityCapitalStructurePercentage_B58C9E9F5C8458BFB673F6A01C40B60A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense" xlink:label="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense_4300F92DC9CB90EF7881F6A01C41BEA8" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense_4300F92DC9CB90EF7881F6A01C41BEA8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesProductionTaxCreditExpirationPeriod" xlink:label="loc_evrg_PublicUtilitiesProductionTaxCreditExpirationPeriod_6966674F9C24A0BD8D7BF6A01C4124BA" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesProductionTaxCreditExpirationPeriod_6966674F9C24A0BD8D7BF6A01C4124BA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense" xlink:label="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense_9E5D471C8295DD75E827F6A01C412CD2" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense_9E5D471C8295DD75E827F6A01C412CD2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountDepreciationExpense" xlink:label="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountDepreciationExpense_570C98DACE987E4194D7F6A01C4174D8" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountDepreciationExpense_570C98DACE987E4194D7F6A01C4174D8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountDepreciationExpense" xlink:label="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountDepreciationExpense_115ABD554B915D2138E2F6A01C4109F1" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountDepreciationExpense_115ABD554B915D2138E2F6A01C4109F1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountRecoveryOfWholesaleContract" xlink:label="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountRecoveryOfWholesaleContract_E5C04338CF6762F6C5F0F6A01C41433F" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountRecoveryOfWholesaleContract_E5C04338CF6762F6C5F0F6A01C41433F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountRecoveryOfWholesaleContract" xlink:label="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountRecoveryOfWholesaleContract_3D91EE8882D13B611A0BF6A01C42B21A" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountRecoveryOfWholesaleContract_3D91EE8882D13B611A0BF6A01C42B21A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountOneTimeBillCredit" xlink:label="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountOneTimeBillCredit_31F72C0D7108551E88A0F6A01C423E17" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountOneTimeBillCredit_31F72C0D7108551E88A0F6A01C423E17" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountOneTimeBillCredit" xlink:label="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountOneTimeBillCredit_1B3CF44AA6246BCED7EDF6A01C4280CE" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountOneTimeBillCredit_1B3CF44AA6246BCED7EDF6A01C4280CE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FinalAmountOfOneTimeCustomerBillCredit" xlink:label="loc_evrg_FinalAmountOfOneTimeCustomerBillCredit_64E1DD3A94AB26BDD349F6C37E740E73" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_FinalAmountOfOneTimeCustomerBillCredit_64E1DD3A94AB26BDD349F6C37E740E73" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountNotIncludingRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense" xlink:label="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountNotIncludingRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense_3A611BDE90EACF0020C8F6A01C42E2B8" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountNotIncludingRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense_3A611BDE90EACF0020C8F6A01C42E2B8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountNotIncludingRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense" xlink:label="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountNotIncludingRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense_BC26FF77F5A445B82A9CF6A01C427901" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesApprovedRateIncreaseDecreaseAmountNotIncludingRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense_BC26FF77F5A445B82A9CF6A01C427901" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_CommissionStaffRecommendedReturnOnEquityPercentage" xlink:label="loc_evrg_CommissionStaffRecommendedReturnOnEquityPercentage_CAE54320DA5C15D4D6E5F6A01C425AF5" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_CommissionStaffRecommendedReturnOnEquityPercentage_CAE54320DA5C15D4D6E5F6A01C425AF5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_CommissionStaffRecommendedRateIncreaseDecreaseAmount" xlink:label="loc_evrg_CommissionStaffRecommendedRateIncreaseDecreaseAmount_BA4F47B6FFB9D8EDE4A8F6A01C437FD5" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_CommissionStaffRecommendedRateIncreaseDecreaseAmount_BA4F47B6FFB9D8EDE4A8F6A01C437FD5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesExpectedAnnualTransmissionsRevenueIncreaseDecreaseAmount" xlink:label="loc_evrg_PublicUtilitiesExpectedAnnualTransmissionsRevenueIncreaseDecreaseAmount_031EA5A0DCE8C2DF1B67F6A01C435FAE" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesExpectedAnnualTransmissionsRevenueIncreaseDecreaseAmount_031EA5A0DCE8C2DF1B67F6A01C435FAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilities" xlink:label="loc_us-gaap_RegulatoryLiabilities_481026F9FE85E5983234F6A01C43F950" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_us-gaap_RegulatoryLiabilities_481026F9FE85E5983234F6A01C43F950" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedAnnualTransmissionsRevenueIncreaseDecreaseOverPriorYearAmount" xlink:label="loc_evrg_PublicUtilitiesEstimatedAnnualTransmissionsRevenueIncreaseDecreaseOverPriorYearAmount_4BD16252F44DACDD80D7F6A01C43C9E7" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesEstimatedAnnualTransmissionsRevenueIncreaseDecreaseOverPriorYearAmount_4BD16252F44DACDD80D7F6A01C43C9E7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedAnnualTransmissionRevenueIncreaseDecreaseOverPriorYearAmountBeforeTaxRateChangeReduction" xlink:label="loc_evrg_PublicUtilitiesEstimatedAnnualTransmissionRevenueIncreaseDecreaseOverPriorYearAmountBeforeTaxRateChangeReduction_DA32465C336D44F86787F6CEE83F1970" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesEstimatedAnnualTransmissionRevenueIncreaseDecreaseOverPriorYearAmountBeforeTaxRateChangeReduction_DA32465C336D44F86787F6CEE83F1970" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedAnnualTransmissionRevenueIncreaseDecreaseOverPriorYearAmountReductionDueToTaxRateChange" xlink:label="loc_evrg_PublicUtilitiesEstimatedAnnualTransmissionRevenueIncreaseDecreaseOverPriorYearAmountReductionDueToTaxRateChange_F9CCA23561C1313AB4D8F6D2746C92EE" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesEstimatedAnnualTransmissionRevenueIncreaseDecreaseOverPriorYearAmountReductionDueToTaxRateChange_F9CCA23561C1313AB4D8F6D2746C92EE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountPerStipulation" xlink:label="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountPerStipulation_CD82328C6245C5A72409F6A01C4387FB" xlink:type="locator" />
    <link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesRequestedRateIncreaseDecreaseAmountPerStipulation_CD82328C6245C5A72409F6A01C4387FB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesRequestedReturnOnEquityPerStipulation" xlink:label="loc_evrg_PublicUtilitiesRequestedReturnOnEquityPerStipulation_C6C1788492AAC15A8D12F6A01C43A6F9" xlink:type="locator" />
    <link:definitionArc order="29" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesRequestedReturnOnEquityPerStipulation_C6C1788492AAC15A8D12F6A01C43A6F9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesRequestedRateMakingEquityRatioPerStipulation" xlink:label="loc_evrg_PublicUtilitiesRequestedRateMakingEquityRatioPerStipulation_86A5AC8C597B06BB35C9F6A01C447536" xlink:type="locator" />
    <link:definitionArc order="30" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_4969C9D50F466B05529CF6A01C3FF8E0" xlink:to="loc_evrg_PublicUtilitiesRequestedRateMakingEquityRatioPerStipulation_86A5AC8C597B06BB35C9F6A01C447536" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RateMattersAndRegulationRateMattersAndRegulationTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RateMattersAndRegulationRegulatoryMattersSubsequentEventsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_6866CDE76E51EADC4220111C7C101959" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_9AA00063C4E94A814943111C7C056032" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_6866CDE76E51EADC4220111C7C101959" xlink:to="loc_us-gaap_SubsequentEventTable_9AA00063C4E94A814943111C7C056032" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingAxis" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_1D8FD0B7F699B73CB515111C7C061724" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_9AA00063C4E94A814943111C7C056032" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_1D8FD0B7F699B73CB515111C7C061724" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_42DB100D902B92C80154111C7C06C213_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_1D8FD0B7F699B73CB515111C7C061724" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_42DB100D902B92C80154111C7C06C213_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_42DB100D902B92C80154111C7C06C213" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_1D8FD0B7F699B73CB515111C7C061724" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_42DB100D902B92C80154111C7C06C213" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TransmissionDeliveryChargeMember" xlink:label="loc_evrg_TransmissionDeliveryChargeMember_607B1D28EFAED5D0FDC4111C7C06EA52" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_42DB100D902B92C80154111C7C06C213" xlink:to="loc_evrg_TransmissionDeliveryChargeMember_607B1D28EFAED5D0FDC4111C7C06EA52" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_A2018RateCaseProceedingsMember" xlink:label="loc_evrg_A2018RateCaseProceedingsMember_5C10F9A86B3F1D1721CF111C7C078568" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_42DB100D902B92C80154111C7C06C213" xlink:to="loc_evrg_A2018RateCaseProceedingsMember_5C10F9A86B3F1D1721CF111C7C078568" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FERCProceedingsMember" xlink:label="loc_evrg_FERCProceedingsMember_C49BA8D3F129334142D9111C7C0CA88F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_42DB100D902B92C80154111C7C06C213" xlink:to="loc_evrg_FERCProceedingsMember_C49BA8D3F129334142D9111C7C0CA88F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FERC2019TFRProceedingMember" xlink:label="loc_evrg_FERC2019TFRProceedingMember_5C7F4917CA1BF0DEE792111C7C0CFB0C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_42DB100D902B92C80154111C7C06C213" xlink:to="loc_evrg_FERC2019TFRProceedingMember_5C7F4917CA1BF0DEE792111C7C0CFB0C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_E03094F024B6A4CD50D1111C7C0CF778" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_9AA00063C4E94A814943111C7C056032" xlink:to="loc_srt_RangeAxis_E03094F024B6A4CD50D1111C7C0CF778" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_08873E02A7E3CDFB5FA0111C7C0D8BE7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_E03094F024B6A4CD50D1111C7C0CF778" xlink:to="loc_srt_RangeMember_08873E02A7E3CDFB5FA0111C7C0D8BE7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_08873E02A7E3CDFB5FA0111C7C0D8BE7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_E03094F024B6A4CD50D1111C7C0CF778" xlink:to="loc_srt_RangeMember_08873E02A7E3CDFB5FA0111C7C0D8BE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_D2F5656D1B2167695D73111C7C0D93F0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_08873E02A7E3CDFB5FA0111C7C0D8BE7" xlink:to="loc_srt_MinimumMember_D2F5656D1B2167695D73111C7C0D93F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_2767BADFDFD12778F6E9111C7C0D4777" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_08873E02A7E3CDFB5FA0111C7C0D8BE7" xlink:to="loc_srt_MaximumMember_2767BADFDFD12778F6E9111C7C0D4777" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_2C65CBB6C1C8133B8C3B111C7C0ED4EC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_9AA00063C4E94A814943111C7C056032" xlink:to="loc_dei_LegalEntityAxis_2C65CBB6C1C8133B8C3B111C7C0ED4EC" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E54BA620A0DF7362F6C9111C7C0E6573_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2C65CBB6C1C8133B8C3B111C7C0ED4EC" xlink:to="loc_dei_EntityDomain_E54BA620A0DF7362F6C9111C7C0E6573_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E54BA620A0DF7362F6C9111C7C0E6573" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2C65CBB6C1C8133B8C3B111C7C0ED4EC" xlink:to="loc_dei_EntityDomain_E54BA620A0DF7362F6C9111C7C0E6573" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_43181CBCE1833E3E130A111C7C0EFBC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E54BA620A0DF7362F6C9111C7C0E6573" xlink:to="loc_evrg_WestarEnergyIncMember_43181CBCE1833E3E130A111C7C0EFBC6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_A52B81EA5FD184707B3F111C7C0EAF7D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E54BA620A0DF7362F6C9111C7C0E6573" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_A52B81EA5FD184707B3F111C7C0EAF7D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_3F0111FC7AE4E975D29C111C7C0EDC94" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E54BA620A0DF7362F6C9111C7C0E6573" xlink:to="loc_evrg_KCPLMember_3F0111FC7AE4E975D29C111C7C0EDC94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyAxis" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_B4761EFD4309B960B35A111C7C0FF97B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_9AA00063C4E94A814943111C7C056032" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_B4761EFD4309B960B35A111C7C0FF97B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_2B5A2473155006D55FD6111C7C0FF8DC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_B4761EFD4309B960B35A111C7C0FF97B" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_2B5A2473155006D55FD6111C7C0FF8DC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_2B5A2473155006D55FD6111C7C0FF8DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_B4761EFD4309B960B35A111C7C0FF97B" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_2B5A2473155006D55FD6111C7C0FF8DC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MissouriPublicServiceCommissionMember" xlink:label="loc_evrg_MissouriPublicServiceCommissionMember_72400B4B7852B8360D1D111C7C0F9AB8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_2B5A2473155006D55FD6111C7C0FF8DC" xlink:to="loc_evrg_MissouriPublicServiceCommissionMember_72400B4B7852B8360D1D111C7C0F9AB8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasCorporationCommissionMember" xlink:label="loc_evrg_KansasCorporationCommissionMember_C4531B8FAA97959137CA111C7C0F24EA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_2B5A2473155006D55FD6111C7C0FF8DC" xlink:to="loc_evrg_KansasCorporationCommissionMember_C4531B8FAA97959137CA111C7C0F24EA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FederalEnergyRegulatoryCommissionMember" xlink:label="loc_evrg_FederalEnergyRegulatoryCommissionMember_4F1D9BB9A70C6B3DD192111C7C0F1B5D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_2B5A2473155006D55FD6111C7C0FF8DC" xlink:to="loc_evrg_FederalEnergyRegulatoryCommissionMember_4F1D9BB9A70C6B3DD192111C7C0F1B5D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_3EB05F92B9FF12629E36111C7C104F58" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_9AA00063C4E94A814943111C7C056032" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_3EB05F92B9FF12629E36111C7C104F58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_254B14E71206702BD175111C7C102733_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_3EB05F92B9FF12629E36111C7C104F58" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_254B14E71206702BD175111C7C102733_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_254B14E71206702BD175111C7C102733" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_3EB05F92B9FF12629E36111C7C104F58" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_254B14E71206702BD175111C7C102733" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_5DFC6BAA2F0C51596E63111C7C1078AC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_254B14E71206702BD175111C7C102733" xlink:to="loc_us-gaap_SubsequentEventMember_5DFC6BAA2F0C51596E63111C7C1078AC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PublicUtilitiesEstimatedAnnualTransmissionsRevenueIncreaseDecreaseOverPriorYearAmount" xlink:label="loc_evrg_PublicUtilitiesEstimatedAnnualTransmissionsRevenueIncreaseDecreaseOverPriorYearAmount_B55C53ACBDB3E5EB8769111C7C108EC8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_6866CDE76E51EADC4220111C7C101959" xlink:to="loc_evrg_PublicUtilitiesEstimatedAnnualTransmissionsRevenueIncreaseDecreaseOverPriorYearAmount_B55C53ACBDB3E5EB8769111C7C108EC8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/Receivables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ReceivablesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_9D48CDD0E08080EC28D5F689DF45DA19" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B3F1515FF34CE250569FF689DF423BBA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_9D48CDD0E08080EC28D5F689DF45DA19" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B3F1515FF34CE250569FF689DF423BBA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_9CB754F9B90BBD537A9AF689DF426208" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B3F1515FF34CE250569FF689DF423BBA" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_9CB754F9B90BBD537A9AF689DF426208" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivableTypeDomain" xlink:label="loc_us-gaap_ReceivableTypeDomain_D6B89A8B53FEEE463E6AF689DF42203F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_9CB754F9B90BBD537A9AF689DF426208" xlink:to="loc_us-gaap_ReceivableTypeDomain_D6B89A8B53FEEE463E6AF689DF42203F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivableTypeDomain" xlink:label="loc_us-gaap_ReceivableTypeDomain_D6B89A8B53FEEE463E6AF689DF42203F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_9CB754F9B90BBD537A9AF689DF426208" xlink:to="loc_us-gaap_ReceivableTypeDomain_D6B89A8B53FEEE463E6AF689DF42203F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TradeAccountsReceivableMember" xlink:label="loc_us-gaap_TradeAccountsReceivableMember_52755028B89509DBCDF6F689DF436B54" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_D6B89A8B53FEEE463E6AF689DF42203F" xlink:to="loc_us-gaap_TradeAccountsReceivableMember_52755028B89509DBCDF6F689DF436B54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_C231CD2B3DAF35D2B2BAF689DF436A95" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B3F1515FF34CE250569FF689DF423BBA" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_C231CD2B3DAF35D2B2BAF689DF436A95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivablesBillingStatusDomain" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_578C449FC8FC1F7AAC73F689DF43D066_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_C231CD2B3DAF35D2B2BAF689DF436A95" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_578C449FC8FC1F7AAC73F689DF43D066_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivablesBillingStatusDomain" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_578C449FC8FC1F7AAC73F689DF43D066" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_C231CD2B3DAF35D2B2BAF689DF436A95" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_578C449FC8FC1F7AAC73F689DF43D066" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BilledRevenuesMember" xlink:label="loc_us-gaap_BilledRevenuesMember_1A5177D82BCA4B559604F689DF43F5DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_578C449FC8FC1F7AAC73F689DF43D066" xlink:to="loc_us-gaap_BilledRevenuesMember_1A5177D82BCA4B559604F689DF43F5DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnbilledRevenuesMember" xlink:label="loc_us-gaap_UnbilledRevenuesMember_5B626BF609F588BBC594F689DF43DF26" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_578C449FC8FC1F7AAC73F689DF43D066" xlink:to="loc_us-gaap_UnbilledRevenuesMember_5B626BF609F588BBC594F689DF43DF26" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_E6CC3F531EE3348D241DF689DF443153" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B3F1515FF34CE250569FF689DF423BBA" xlink:to="loc_dei_LegalEntityAxis_E6CC3F531EE3348D241DF689DF443153" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6A3F1C5D5E8A9202A60CF689DF443574_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_E6CC3F531EE3348D241DF689DF443153" xlink:to="loc_dei_EntityDomain_6A3F1C5D5E8A9202A60CF689DF443574_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6A3F1C5D5E8A9202A60CF689DF443574" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_E6CC3F531EE3348D241DF689DF443153" xlink:to="loc_dei_EntityDomain_6A3F1C5D5E8A9202A60CF689DF443574" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_1865587FFAE2D3F0B5AEF689DF449C38" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6A3F1C5D5E8A9202A60CF689DF443574" xlink:to="loc_evrg_WestarEnergyIncMember_1865587FFAE2D3F0B5AEF689DF449C38" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_3E3B9E6E8FECF6511265F689DF44E0CF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6A3F1C5D5E8A9202A60CF689DF443574" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_3E3B9E6E8FECF6511265F689DF44E0CF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_219CCB50ACCC4599A853F689DF45C7C7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6A3F1C5D5E8A9202A60CF689DF443574" xlink:to="loc_evrg_KCPLMember_219CCB50ACCC4599A853F689DF45C7C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableGrossCurrent" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_65E5685FBF670116F67CF689DF458004" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_9D48CDD0E08080EC28D5F689DF45DA19" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_65E5685FBF670116F67CF689DF458004" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherReceivablesGrossCurrent" xlink:label="loc_us-gaap_OtherReceivablesGrossCurrent_AED486686E9683D43E82F689DF45DEA6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_9D48CDD0E08080EC28D5F689DF45DA19" xlink:to="loc_us-gaap_OtherReceivablesGrossCurrent_AED486686E9683D43E82F689DF45DEA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_67C54CDCA2927FF4023AF689DF45B35A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_9D48CDD0E08080EC28D5F689DF45DA19" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_67C54CDCA2927FF4023AF689DF45B35A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivablesNetCurrent" xlink:label="loc_us-gaap_ReceivablesNetCurrent_CB2946EABA3E88FC6050F689DF45EAF7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_9D48CDD0E08080EC28D5F689DF45DA19" xlink:to="loc_us-gaap_ReceivablesNetCurrent_CB2946EABA3E88FC6050F689DF45EAF7" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ReceivablesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_91C7BE8A41B19453D6F6F689E15B663D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_BF74F73638B02F029263F689E1599954" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_91C7BE8A41B19453D6F6F689E15B663D" xlink:to="loc_us-gaap_StatementTable_BF74F73638B02F029263F689E1599954" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_EF65DF1DCD2802F735DFF689E15A9DF1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_BF74F73638B02F029263F689E1599954" xlink:to="loc_dei_LegalEntityAxis_EF65DF1DCD2802F735DFF689E15A9DF1" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_ED4763EAEEE8166349C5F689E15AE76F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_EF65DF1DCD2802F735DFF689E15A9DF1" xlink:to="loc_dei_EntityDomain_ED4763EAEEE8166349C5F689E15AE76F_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_ED4763EAEEE8166349C5F689E15AE76F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_EF65DF1DCD2802F735DFF689E15A9DF1" xlink:to="loc_dei_EntityDomain_ED4763EAEEE8166349C5F689E15AE76F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_474B9EF32002BE8EB652F689E15A8F3C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ED4763EAEEE8166349C5F689E15AE76F" xlink:to="loc_evrg_WestarEnergyIncMember_474B9EF32002BE8EB652F689E15A8F3C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_85EAFC45AC7F0839EE70F689E15BF7B2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ED4763EAEEE8166349C5F689E15AE76F" xlink:to="loc_evrg_KCPLMember_85EAFC45AC7F0839EE70F689E15BF7B2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_A3718A794AC2AA10270CF689E15BF2C9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ED4763EAEEE8166349C5F689E15AE76F" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_A3718A794AC2AA10270CF689E15BF2C9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherReceivablesContractsWithCustomers" xlink:label="loc_evrg_OtherReceivablesContractsWithCustomers_FCC7F77F8A544DD3A455F689E15B3D7A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_91C7BE8A41B19453D6F6F689E15B663D" xlink:to="loc_evrg_OtherReceivablesContractsWithCustomers_FCC7F77F8A544DD3A455F689E15B3D7A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract" xlink:label="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_91C7BE8A41B19453D6F6F689E15B663D" xlink:to="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount" xlink:label="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount_937B90748C64149C57CFF689E15CE8B0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount_937B90748C64149C57CFF689E15CE8B0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidDecToMidJan" xlink:label="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidDecToMidJan_CF674575E02A809C1842F689E15CAF02" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidDecToMidJan_CF674575E02A809C1842F689E15CAF02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount" xlink:label="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount_B07CA26200D21D0A2E93F689E15C3941" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount_B07CA26200D21D0A2E93F689E15C3941" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidNovToMidJun" xlink:label="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidNovToMidJun_306E9F04435D8EB077F4F689E15C8CA3" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidNovToMidJun_306E9F04435D8EB077F4F689E15C8CA3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreement" xlink:label="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreement_53842919CF7DE431B458F689E15CD0EE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreement_53842919CF7DE431B458F689E15CD0EE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromJanToMidFeb" xlink:label="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromJanToMidFeb_5EA00C3C665E7AA2F8AEF689E15D4ACD" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromJanToMidFeb_5EA00C3C665E7AA2F8AEF689E15D4ACD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MaximumAmountOfOutstandingPrincipalUnderReceivableAgreementFromMidJulyToExpiration" xlink:label="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivableAgreementFromMidJulyToExpiration_640AF5003A3A77B5D0DBF689E15D62D6" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivableAgreementFromMidJulyToExpiration_640AF5003A3A77B5D0DBF689E15D62D6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidFebruarytoMidJuly" xlink:label="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidFebruarytoMidJuly_DBC6481FCAB23E718E47F689E15D8E56" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidFebruarytoMidJuly_DBC6481FCAB23E718E47F689E15D8E56" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidJunToExpiration" xlink:label="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidJunToExpiration_3A299C493307D28ECE70F689E15DB6E1" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SaleOfAccountsReceivableKCPLandGMOLineItemsAbstract_D2D2A486DE26F6B3BFBEF689E15C8E09" xlink:to="loc_evrg_MaximumAmountOfOutstandingPrincipalUnderReceivablesAgreementFromMidJunToExpiration_3A299C493307D28ECE70F689E15DB6E1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ReceivablesSummaryOfBadDebtExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_332BB983753636E14C0DEEAF5355E3F6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B52825F8DBBDBC7A2082EEAF5355D7E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_332BB983753636E14C0DEEAF5355E3F6" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B52825F8DBBDBC7A2082EEAF5355D7E2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_9A43EB28F76A1CE5B04EEEC6A188A892" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B52825F8DBBDBC7A2082EEAF5355D7E2" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_9A43EB28F76A1CE5B04EEEC6A188A892" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivableTypeDomain" xlink:label="loc_us-gaap_ReceivableTypeDomain_9CEE7C4A508B99DABE56EEC6A18832AF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_9A43EB28F76A1CE5B04EEEC6A188A892" xlink:to="loc_us-gaap_ReceivableTypeDomain_9CEE7C4A508B99DABE56EEC6A18832AF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivableTypeDomain" xlink:label="loc_us-gaap_ReceivableTypeDomain_9CEE7C4A508B99DABE56EEC6A18832AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_9A43EB28F76A1CE5B04EEEC6A188A892" xlink:to="loc_us-gaap_ReceivableTypeDomain_9CEE7C4A508B99DABE56EEC6A18832AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CustomerContractsMember" xlink:label="loc_us-gaap_CustomerContractsMember_02422CF6DD8A9089F813EEC6F625BF8F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_9CEE7C4A508B99DABE56EEC6A18832AF" xlink:to="loc_us-gaap_CustomerContractsMember_02422CF6DD8A9089F813EEC6F625BF8F" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_8F90152E2AC14F9359BCEEAF5355E202" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B52825F8DBBDBC7A2082EEAF5355D7E2" xlink:to="loc_dei_LegalEntityAxis_8F90152E2AC14F9359BCEEAF5355E202" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_EEDDE44989B426648386EEAF535584D4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8F90152E2AC14F9359BCEEAF5355E202" xlink:to="loc_dei_EntityDomain_EEDDE44989B426648386EEAF535584D4_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_EEDDE44989B426648386EEAF535584D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8F90152E2AC14F9359BCEEAF5355E202" xlink:to="loc_dei_EntityDomain_EEDDE44989B426648386EEAF535584D4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_8F6969E31A6C27F21C64EEAF53550CDE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_EEDDE44989B426648386EEAF535584D4" xlink:to="loc_evrg_WestarEnergyIncMember_8F6969E31A6C27F21C64EEAF53550CDE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_E31D8E1BA333F8EFEB5EEEAF5355734D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_EEDDE44989B426648386EEAF535584D4" xlink:to="loc_evrg_KCPLMember_E31D8E1BA333F8EFEB5EEEAF5355734D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_2E16D2F7715F990A12DBEEAF535521D3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_B52825F8DBBDBC7A2082EEAF5355D7E2" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_2E16D2F7715F990A12DBEEAF535521D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_664854C1D0DA41FB118BEEAF53553A85_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_2E16D2F7715F990A12DBEEAF535521D3" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_664854C1D0DA41FB118BEEAF53553A85_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_664854C1D0DA41FB118BEEAF53553A85" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_2E16D2F7715F990A12DBEEAF535521D3" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_664854C1D0DA41FB118BEEAF53553A85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForCreditLossMember" xlink:label="loc_us-gaap_AllowanceForCreditLossMember_B5BD22608149387C661DEEAF53552767" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_664854C1D0DA41FB118BEEAF53553A85" xlink:to="loc_us-gaap_AllowanceForCreditLossMember_B5BD22608149387C661DEEAF53552767" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_15760AFD91EEF7343FC4EEAF536523D6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_332BB983753636E14C0DEEAF5355E3F6" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_15760AFD91EEF7343FC4EEAF536523D6" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ReceivablesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RegulatoryMattersAssetDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetLineItems" xlink:label="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRegulatoryAssetsTable" xlink:label="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_27001DCBC5D5716695A7086DB65AA485" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:to="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_27001DCBC5D5716695A7086DB65AA485" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1301B1104417968A21E0086DB65B1CA6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_27001DCBC5D5716695A7086DB65AA485" xlink:to="loc_dei_LegalEntityAxis_1301B1104417968A21E0086DB65B1CA6" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_BE4DFC66D68E1474FC0D086DB65BAA40_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1301B1104417968A21E0086DB65B1CA6" xlink:to="loc_dei_EntityDomain_BE4DFC66D68E1474FC0D086DB65BAA40_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_BE4DFC66D68E1474FC0D086DB65BAA40" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1301B1104417968A21E0086DB65B1CA6" xlink:to="loc_dei_EntityDomain_BE4DFC66D68E1474FC0D086DB65BAA40" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_5EFAEA7015432609B742086DB65B29F9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_BE4DFC66D68E1474FC0D086DB65BAA40" xlink:to="loc_evrg_WestarEnergyIncMember_5EFAEA7015432609B742086DB65B29F9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_21FCE41727B1F6CBE9C1086DB65BE935" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_BE4DFC66D68E1474FC0D086DB65BAA40" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_21FCE41727B1F6CBE9C1086DB65BE935" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_491EF8EECBEEAE6AE043086DB65C3BE1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_BE4DFC66D68E1474FC0D086DB65BAA40" xlink:to="loc_evrg_KCPLMember_491EF8EECBEEAE6AE043086DB65C3BE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_5FCC79C7F66E43E260EC086DB65C4C73" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_27001DCBC5D5716695A7086DB65AA485" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_5FCC79C7F66E43E260EC086DB65C4C73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_20ECF8E2A0A8953651E1086DB65C182E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_5FCC79C7F66E43E260EC086DB65C4C73" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_20ECF8E2A0A8953651E1086DB65C182E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_20ECF8E2A0A8953651E1086DB65C182E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_5FCC79C7F66E43E260EC086DB65C4C73" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_20ECF8E2A0A8953651E1086DB65C182E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LaCygneStationMember" xlink:label="loc_evrg_LaCygneStationMember_608BFB431CAB82E70F73086DB65C9FD1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_20ECF8E2A0A8953651E1086DB65C182E" xlink:to="loc_evrg_LaCygneStationMember_608BFB431CAB82E70F73086DB65C9FD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetAxis" xlink:label="loc_us-gaap_RegulatoryAssetAxis_9527D2BD6ABE75CC70A9086DB65DAEF7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_27001DCBC5D5716695A7086DB65AA485" xlink:to="loc_us-gaap_RegulatoryAssetAxis_9527D2BD6ABE75CC70A9086DB65DAEF7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAssetAxis_9527D2BD6ABE75CC70A9086DB65DAEF7" xlink:to="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAssetAxis_9527D2BD6ABE75CC70A9086DB65DAEF7" xlink:to="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementPlansCostsMember" xlink:label="loc_us-gaap_PensionAndOtherPostretirementPlansCostsMember_2864267CAE1843E16802086DB65DAA28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_PensionAndOtherPostretirementPlansCostsMember_2864267CAE1843E16802086DB65DAA28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossOnReacquiredDebtMember" xlink:label="loc_us-gaap_LossOnReacquiredDebtMember_7BEFFEE79145AA4D29F7086DB65EEFDA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_LossOnReacquiredDebtMember_7BEFFEE79145AA4D29F7086DB65EEFDA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtFairValueAdjustmentMember" xlink:label="loc_evrg_DebtFairValueAdjustmentMember_22A2CF218C8D1EEEB6C2086DB65E868E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_DebtFairValueAdjustmentMember_22A2CF218C8D1EEEB6C2086DB65E868E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AssetRetirementObligationsFairValueAdjustmentMember" xlink:label="loc_evrg_AssetRetirementObligationsFairValueAdjustmentMember_D008EF0BA9C29C844C52086DB65EC526" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_AssetRetirementObligationsFairValueAdjustmentMember_D008EF0BA9C29C844C52086DB65EC526" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DepreciationMember" xlink:label="loc_evrg_DepreciationMember_843BDBB7FB812E2DDDCA086DB65EC509" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_DepreciationMember_843BDBB7FB812E2DDDCA086DB65EC509" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RemovalCostsMember" xlink:label="loc_us-gaap_RemovalCostsMember_DCBF3183DF59BAEFE018086DB65F0266" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_RemovalCostsMember_DCBF3183DF59BAEFE018086DB65F0266" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationCostsMember" xlink:label="loc_us-gaap_AssetRetirementObligationCostsMember_F5189C00215B7062B789086DB65F0A7C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_AssetRetirementObligationCostsMember_F5189C00215B7062B789086DB65F0A7C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AnalogMeterUnvrecoveredInvestmentMember" xlink:label="loc_evrg_AnalogMeterUnvrecoveredInvestmentMember_1ED7E13FCA9DE2A453D7086DB65F03EB" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_AnalogMeterUnvrecoveredInvestmentMember_1ED7E13FCA9DE2A453D7086DB65F03EB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TreasuryYieldHedgeMember" xlink:label="loc_evrg_TreasuryYieldHedgeMember_7CED34EC23D32A2B3257086DB65F54E3" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_TreasuryYieldHedgeMember_7CED34EC23D32A2B3257086DB65F54E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashFlowHedgingMember" xlink:label="loc_us-gaap_CashFlowHedgingMember_B99052A8EC9A53DEA63C086DB65FAE44" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_CashFlowHedgingMember_B99052A8EC9A53DEA63C086DB65FAE44" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IatanNo1AndCommonFacilitiesDepreciationAndCarryingCostsMember" xlink:label="loc_evrg_IatanNo1AndCommonFacilitiesDepreciationAndCarryingCostsMember_468E9505741014339B55086DB660D227" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_IatanNo1AndCommonFacilitiesDepreciationAndCarryingCostsMember_468E9505741014339B55086DB660D227" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IatanNo2ConstructionAccountingCostsMember" xlink:label="loc_evrg_IatanNo2ConstructionAccountingCostsMember_6D7B04F6D634DF5958CF086DB660E7C2" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_IatanNo2ConstructionAccountingCostsMember_6D7B04F6D634DF5958CF086DB660E7C2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasPropertyTaxSurchargeMember" xlink:label="loc_evrg_KansasPropertyTaxSurchargeMember_9391C07B2113D6FDD365086DB6608379" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_KansasPropertyTaxSurchargeMember_9391C07B2113D6FDD365086DB6608379" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DisallowedPlantCostsMember" xlink:label="loc_evrg_DisallowedPlantCostsMember_4B168329DBF2AAF2DEE9086DB660F5EF" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_DisallowedPlantCostsMember_4B168329DBF2AAF2DEE9086DB660F5EF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LaCygneDeferredDepreciationMember" xlink:label="loc_evrg_LaCygneDeferredDepreciationMember_76DA37B2BAEBD600C8FC086DB6609B5D" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_LaCygneDeferredDepreciationMember_76DA37B2BAEBD600C8FC086DB6609B5D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DeferredCustomerProgramsMember" xlink:label="loc_evrg_DeferredCustomerProgramsMember_DC9E9585C0CD18B1179F086DB6600087" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_DeferredCustomerProgramsMember_DC9E9585C0CD18B1179F086DB6600087" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFuelCostsMember" xlink:label="loc_us-gaap_DeferredFuelCostsMember_4BA33A8831431BEFDBF2086DB660E0FE" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_DeferredFuelCostsMember_4BA33A8831431BEFDBF2086DB660E0FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RenewableEnergyProgramMember" xlink:label="loc_us-gaap_RenewableEnergyProgramMember_9B4FD8B2D5DD69AB32AB086DB6610AB1" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_RenewableEnergyProgramMember_9B4FD8B2D5DD69AB32AB086DB6610AB1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TransmissionDeliveryChargeMember" xlink:label="loc_evrg_TransmissionDeliveryChargeMember_1B4E159DDF85F24E9095086DB661DCB8" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_TransmissionDeliveryChargeMember_1B4E159DDF85F24E9095086DB661DCB8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WolfCreekoutageMember" xlink:label="loc_evrg_WolfCreekoutageMember_CD0A1942A56F6F735025086DB6610AFE" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_WolfCreekoutageMember_CD0A1942A56F6F735025086DB6610AFE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PensionAndOtherPostretirementBenefitNonserviceCostsMember" xlink:label="loc_evrg_PensionAndOtherPostretirementBenefitNonserviceCostsMember_F03E4F6BE8F26166FB7C086DB661EB9A" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_PensionAndOtherPostretirementBenefitNonserviceCostsMember_F03E4F6BE8F26166FB7C086DB661EB9A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RetiredGenerationFacilityMember" xlink:label="loc_evrg_RetiredGenerationFacilityMember_888F56F74663F637A8D4086DB66120C6" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_RetiredGenerationFacilityMember_888F56F74663F637A8D4086DB66120C6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MergerTransitionCostsMember" xlink:label="loc_evrg_MergerTransitionCostsMember_2D6368494B018FC078B4086DB6627D7D" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_MergerTransitionCostsMember_2D6368494B018FC078B4086DB6627D7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherRegulatoryAssetsLiabilitiesMember" xlink:label="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_749BCBA8F363B78625F3086DB662444A" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_749BCBA8F363B78625F3086DB662444A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxChargesMember" xlink:label="loc_us-gaap_DeferredIncomeTaxChargesMember_38497A7DD1DA70009E48086DB662A44D" xlink:type="locator" />
    <link:definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_DeferredIncomeTaxChargesMember_38497A7DD1DA70009E48086DB662A44D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RateCaseExpensesMember" xlink:label="loc_evrg_RateCaseExpensesMember_E357F42665B3DC15E812086DB6625423" xlink:type="locator" />
    <link:definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_RateCaseExpensesMember_E357F42665B3DC15E812086DB6625423" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredDerivativeGainLossMember" xlink:label="loc_us-gaap_DeferredDerivativeGainLossMember_FB0109BC507A2D870701086DB663DA23" xlink:type="locator" />
    <link:definitionArc order="27" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_us-gaap_DeferredDerivativeGainLossMember_FB0109BC507A2D870701086DB663DA23" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_VoluntarySeparationProgramMember" xlink:label="loc_evrg_VoluntarySeparationProgramMember_A5BF8E35DCDBFDE1A75C086DB663E394" xlink:type="locator" />
    <link:definitionArc order="28" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_71F52060F17E482FC177086DB65DE8D8" xlink:to="loc_evrg_VoluntarySeparationProgramMember_A5BF8E35DCDBFDE1A75C086DB663E394" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyAxis" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_F511AEADC4F4586B1978086DB664114B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_27001DCBC5D5716695A7086DB65AA485" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_F511AEADC4F4586B1978086DB664114B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_18E2A33073697CD16836086DB66470F6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_F511AEADC4F4586B1978086DB664114B" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_18E2A33073697CD16836086DB66470F6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_18E2A33073697CD16836086DB66470F6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_F511AEADC4F4586B1978086DB664114B" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_18E2A33073697CD16836086DB66470F6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasCorporationCommissionMember" xlink:label="loc_evrg_KansasCorporationCommissionMember_0A817C458863E634F6D6086DB664C4B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_18E2A33073697CD16836086DB66470F6" xlink:to="loc_evrg_KansasCorporationCommissionMember_0A817C458863E634F6D6086DB664C4B3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MissouriPublicServiceDivisionMember" xlink:label="loc_evrg_MissouriPublicServiceDivisionMember_3ABFE2C7133CDAEE590D086DB66480FF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_18E2A33073697CD16836086DB66470F6" xlink:to="loc_evrg_MissouriPublicServiceDivisionMember_3ABFE2C7133CDAEE590D086DB66480FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssets" xlink:label="loc_us-gaap_RegulatoryAssets_B05330F477E61B5FB7F2086DB66588DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:to="loc_us-gaap_RegulatoryAssets_B05330F477E61B5FB7F2086DB66588DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="loc_us-gaap_RegulatoryAssetsCurrent_6C364D7E7542701C9D52086DB665E952" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:to="loc_us-gaap_RegulatoryAssetsCurrent_6C364D7E7542701C9D52086DB665E952" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_3A965D87BD605E88C7AD086DB6666560" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_3A965D87BD605E88C7AD086DB6666560" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided" xlink:label="loc_us-gaap_RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided_04EF1F9DEF4B7143B096086DB666031E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:to="loc_us-gaap_RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided_04EF1F9DEF4B7143B096086DB666031E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryNoncurrentAssetEndDateForRecovery" xlink:label="loc_us-gaap_RegulatoryNoncurrentAssetEndDateForRecovery_15164BE949372B0DB428086DB666523D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:to="loc_us-gaap_RegulatoryNoncurrentAssetEndDateForRecovery_15164BE949372B0DB428086DB666523D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetAmortizationPeriod" xlink:label="loc_us-gaap_RegulatoryAssetAmortizationPeriod_41C9C22FE3B7A6A62E40086DB6667C06" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:to="loc_us-gaap_RegulatoryAssetAmortizationPeriod_41C9C22FE3B7A6A62E40086DB6667C06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityOwnershipPercentage" xlink:label="loc_us-gaap_VariableInterestEntityOwnershipPercentage_EBDCFA3ED2E1710EB3E9086DB666E0CD" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_3A1ECDAD62F3554822AB086DB665023F" xlink:to="loc_us-gaap_VariableInterestEntityOwnershipPercentage_EBDCFA3ED2E1710EB3E9086DB666E0CD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RegulatoryMattersLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilitiesLineItems" xlink:label="loc_us-gaap_RegulatoryLiabilitiesLineItems_1BB3D53CB8BF89175BEAE453B6B1361E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRegulatoryLiabilitiesTable" xlink:label="loc_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_BF46D2059813A3D48546E453B6AC44B0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_1BB3D53CB8BF89175BEAE453B6B1361E" xlink:to="loc_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_BF46D2059813A3D48546E453B6AC44B0" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_D5824752A5AE42B75587E453B6AC5478" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_BF46D2059813A3D48546E453B6AC44B0" xlink:to="loc_dei_LegalEntityAxis_D5824752A5AE42B75587E453B6AC5478" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_2D9384EEED54E2DB7974E453B6ACDC3C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_D5824752A5AE42B75587E453B6AC5478" xlink:to="loc_dei_EntityDomain_2D9384EEED54E2DB7974E453B6ACDC3C_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_2D9384EEED54E2DB7974E453B6ACDC3C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_D5824752A5AE42B75587E453B6AC5478" xlink:to="loc_dei_EntityDomain_2D9384EEED54E2DB7974E453B6ACDC3C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_57A2267B1CC1CF583468E453B6AD2FE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2D9384EEED54E2DB7974E453B6ACDC3C" xlink:to="loc_evrg_WestarEnergyIncMember_57A2267B1CC1CF583468E453B6AD2FE1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_BFF4D100568DE3F7F5EBE453B6AD596B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2D9384EEED54E2DB7974E453B6ACDC3C" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_BFF4D100568DE3F7F5EBE453B6AD596B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_07FB1465400EE98D7344E453B6AD6021" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2D9384EEED54E2DB7974E453B6ACDC3C" xlink:to="loc_evrg_KCPLMember_07FB1465400EE98D7344E453B6AD6021" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="loc_us-gaap_RegulatoryLiabilityAxis_4D189E04F4AA78751510E453B6AD63CD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_BF46D2059813A3D48546E453B6AC44B0" xlink:to="loc_us-gaap_RegulatoryLiabilityAxis_4D189E04F4AA78751510E453B6AD63CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_4D189E04F4AA78751510E453B6AD63CD" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_4D189E04F4AA78751510E453B6AD63CD" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DeferredRefundableIncomeTaxesMember" xlink:label="loc_evrg_DeferredRefundableIncomeTaxesMember_CEF05B25A9BBE8A4475FE453B6AECA80" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_DeferredRefundableIncomeTaxesMember_CEF05B25A9BBE8A4475FE453B6AECA80" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DeferredregulatorygainfromsaleleasebackMember" xlink:label="loc_evrg_DeferredregulatorygainfromsaleleasebackMember_B92B6B93F2038E0849A3E453B6AFDCD5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_DeferredregulatorygainfromsaleleasebackMember_B92B6B93F2038E0849A3E453B6AFDCD5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EmissionAllowancesMember" xlink:label="loc_evrg_EmissionAllowancesMember_2C78B6BC751FB6A7E4F7E453B6AFC607" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_EmissionAllowancesMember_2C78B6BC751FB6A7E4F7E453B6AFC607" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NucleardecommissioningMember" xlink:label="loc_evrg_NucleardecommissioningMember_92E8C01927DF972E5259E453B6AF253F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_NucleardecommissioningMember_92E8C01927DF972E5259E453B6AF253F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementPlansCostsMember" xlink:label="loc_us-gaap_PensionAndOtherPostretirementPlansCostsMember_76A408DA7972907FE18FE453B6AFAB6C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_us-gaap_PensionAndOtherPostretirementPlansCostsMember_76A408DA7972907FE18FE453B6AFAB6C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JurisdictionalAllowanceForFundsUsedDuringConstructionMember" xlink:label="loc_evrg_JurisdictionalAllowanceForFundsUsedDuringConstructionMember_309253E7610883435AA1E453B6B0E868" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_JurisdictionalAllowanceForFundsUsedDuringConstructionMember_309253E7610883435AA1E453B6B0E868" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LaCygneLeaseholdDismantlingCostsMember" xlink:label="loc_evrg_LaCygneLeaseholdDismantlingCostsMember_FCFA4A0460C4372596E4E453B6B0EACF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_LaCygneLeaseholdDismantlingCostsMember_FCFA4A0460C4372596E4E453B6B0EACF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RemovalCostsMember" xlink:label="loc_us-gaap_RemovalCostsMember_BD0E9470D86DA2539731E453B6B08836" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_us-gaap_RemovalCostsMember_BD0E9470D86DA2539731E453B6B08836" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasTaxCreditsMember" xlink:label="loc_evrg_KansasTaxCreditsMember_79971E6999C6831457CCE453B6B093FF" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_KansasTaxCreditsMember_79971E6999C6831457CCE453B6B093FF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PurchasePowerAgreementMember" xlink:label="loc_evrg_PurchasePowerAgreementMember_306E5626DAC9A2033F39E453B6B065B4" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_PurchasePowerAgreementMember_306E5626DAC9A2033F39E453B6B065B4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MergerCustomerCreditsMember" xlink:label="loc_evrg_MergerCustomerCreditsMember_1F178A63DDCEDB57A7C8E453B6B022A8" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_MergerCustomerCreditsMember_1F178A63DDCEDB57A7C8E453B6B022A8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RefundoftaxreformbenefitsMember" xlink:label="loc_evrg_RefundoftaxreformbenefitsMember_25724B068037E5C4CB8FE453B6B1E0F7" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_evrg_RefundoftaxreformbenefitsMember_25724B068037E5C4CB8FE453B6B1E0F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherRegulatoryAssetsLiabilitiesMember" xlink:label="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_D2D565D8C69FF3C20C77E453B6B1A2D0" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_A60105A43ED0E837F7B3E453B6AEB589" xlink:to="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_D2D565D8C69FF3C20C77E453B6B1A2D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryNoncurrentAssetEndDateForRecovery" xlink:label="loc_us-gaap_RegulatoryNoncurrentAssetEndDateForRecovery_F7CEA7FBA3AC2909A83CE453B6B1EE8E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_1BB3D53CB8BF89175BEAE453B6B1361E" xlink:to="loc_us-gaap_RegulatoryNoncurrentAssetEndDateForRecovery_F7CEA7FBA3AC2909A83CE453B6B1EE8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilities" xlink:label="loc_us-gaap_RegulatoryLiabilities_7956327339EAB6425FE4E453B6B196FD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_1BB3D53CB8BF89175BEAE453B6B1361E" xlink:to="loc_us-gaap_RegulatoryLiabilities_7956327339EAB6425FE4E453B6B196FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityCurrent_24682C0AF33A239CC5D4E453B6B16514" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_1BB3D53CB8BF89175BEAE453B6B1361E" xlink:to="loc_us-gaap_RegulatoryLiabilityCurrent_24682C0AF33A239CC5D4E453B6B16514" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_4E98B653C59F954EBFC5E453B6B26911" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_1BB3D53CB8BF89175BEAE453B6B1361E" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_4E98B653C59F954EBFC5E453B6B26911" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityAmortizationPeriod" xlink:label="loc_us-gaap_RegulatoryLiabilityAmortizationPeriod_EDA3BCFC174471B5CE42E453B6B23552" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_1BB3D53CB8BF89175BEAE453B6B1361E" xlink:to="loc_us-gaap_RegulatoryLiabilityAmortizationPeriod_EDA3BCFC174471B5CE42E453B6B23552" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RelatedPartyTransactionsAndRelationships" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RelatedPartyTransactionsAndRelationshipsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_3B0970F85C5DADFDB9F2FD41850EA9A6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6CB6EB688C636DBF69B3FD41850ECCB8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_3B0970F85C5DADFDB9F2FD41850EA9A6" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6CB6EB688C636DBF69B3FD41850ECCB8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantAxis" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantAxis_DA96406C057D99F646BDFD41850EFB73" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6CB6EB688C636DBF69B3FD41850ECCB8" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantAxis_DA96406C057D99F646BDFD41850EFB73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_699D111AB8A843E4601AFD41850EC8BB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_DA96406C057D99F646BDFD41850EFB73" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_699D111AB8A843E4601AFD41850EC8BB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantDomain" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantDomain_699D111AB8A843E4601AFD41850EC8BB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantAxis_DA96406C057D99F646BDFD41850EFB73" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantDomain_699D111AB8A843E4601AFD41850EC8BB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JointlyOwnedElectricityGenerationPlantIatanNo1And2Member" xlink:label="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanNo1And2Member_AEA5E89C36FB58CDCAC9FD41850E9AC9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_699D111AB8A843E4601AFD41850EC8BB" xlink:to="loc_evrg_JointlyOwnedElectricityGenerationPlantIatanNo1And2Member_AEA5E89C36FB58CDCAC9FD41850E9AC9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JeffreyEnergyCenterMember" xlink:label="loc_evrg_JeffreyEnergyCenterMember_9AAC6ED52CB5845B814AFD41850EBFB9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_699D111AB8A843E4601AFD41850EC8BB" xlink:to="loc_evrg_JeffreyEnergyCenterMember_9AAC6ED52CB5845B814AFD41850EBFB9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LaCygneStationMember" xlink:label="loc_evrg_LaCygneStationMember_FF8C62A367BCB5A4BD6CFD41850EAA56" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_JointlyOwnedUtilityPlantDomain_699D111AB8A843E4601AFD41850EC8BB" xlink:to="loc_evrg_LaCygneStationMember_FF8C62A367BCB5A4BD6CFD41850EAA56" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_3031EC14B056FD6C44BDFD41850E5EB5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6CB6EB688C636DBF69B3FD41850ECCB8" xlink:to="loc_dei_LegalEntityAxis_3031EC14B056FD6C44BDFD41850E5EB5" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_35D1E7BFAEDE0912552AFD41850EC273_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3031EC14B056FD6C44BDFD41850E5EB5" xlink:to="loc_dei_EntityDomain_35D1E7BFAEDE0912552AFD41850EC273_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_35D1E7BFAEDE0912552AFD41850EC273" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3031EC14B056FD6C44BDFD41850E5EB5" xlink:to="loc_dei_EntityDomain_35D1E7BFAEDE0912552AFD41850EC273" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_81F44E1D9E2FB8DF28FCFD41850E85FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_35D1E7BFAEDE0912552AFD41850EC273" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_81F44E1D9E2FB8DF28FCFD41850E85FB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_C65ABD1056F4E5955BBFFD41850EC9C4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_35D1E7BFAEDE0912552AFD41850EC273" xlink:to="loc_evrg_WestarEnergyIncMember_C65ABD1056F4E5955BBFFD41850EC9C4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_328039B7A6B1F7DB7F45FD41850E4A92" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_35D1E7BFAEDE0912552AFD41850EC273" xlink:to="loc_evrg_KCPLMember_328039B7A6B1F7DB7F45FD41850E4A92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_90B8FEE1E06566BC20A8FD41850ED7E4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6CB6EB688C636DBF69B3FD41850ECCB8" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_90B8FEE1E06566BC20A8FD41850ED7E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_90B8FEE1E06566BC20A8FD41850ED7E4" xlink:to="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_90B8FEE1E06566BC20A8FD41850ED7E4" xlink:to="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_62D3B6A0BEF930A3F1E2FD41850E618E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_62D3B6A0BEF930A3F1E2FD41850E618E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_FA7FEF78B37AAD02795EFD41850EED44" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A" xlink:to="loc_evrg_KCPLMember_FA7FEF78B37AAD02795EFD41850EED44" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_A77897FD3A3254CB4434FD41850E77E9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A" xlink:to="loc_evrg_WestarEnergyIncMember_A77897FD3A3254CB4434FD41850E77E9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EvergyMember" xlink:label="loc_evrg_EvergyMember_288958BD8899179E875DFD41850EE436" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A" xlink:to="loc_evrg_EvergyMember_288958BD8899179E875DFD41850EE436" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_60E4B2A1C997AB612FFFFD41850ED86C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_623049A44DCECF3E0BB0FD41850E315A" xlink:to="loc_evrg_GreatPlainsEnergyMember_60E4B2A1C997AB612FFFFD41850ED86C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_80AA970685F1EEF9F763FD41850E2DEF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6CB6EB688C636DBF69B3FD41850ECCB8" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_80AA970685F1EEF9F763FD41850E2DEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_B1927C61F7C6D68093B6FD41850EB15E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_80AA970685F1EEF9F763FD41850E2DEF" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_B1927C61F7C6D68093B6FD41850EB15E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_B1927C61F7C6D68093B6FD41850EB15E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_80AA970685F1EEF9F763FD41850E2DEF" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_B1927C61F7C6D68093B6FD41850EB15E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OperatingExpensesAndCapitalCostsBilledMember" xlink:label="loc_evrg_OperatingExpensesAndCapitalCostsBilledMember_23F6BF331FF1B0ED0211FD41850E720C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_B1927C61F7C6D68093B6FD41850EB15E" xlink:to="loc_evrg_OperatingExpensesAndCapitalCostsBilledMember_23F6BF331FF1B0ED0211FD41850E720C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_MoneyPoolMember" xlink:label="loc_evrg_MoneyPoolMember_AD891C0B0AA710F8C682FD41850E2632" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_B1927C61F7C6D68093B6FD41850EB15E" xlink:to="loc_evrg_MoneyPoolMember_AD891C0B0AA710F8C682FD41850E2632" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncomeTaxesPayableMember" xlink:label="loc_evrg_IncomeTaxesPayableMember_057CE60E350492F2C895FD41850E6D68" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_B1927C61F7C6D68093B6FD41850EB15E" xlink:to="loc_evrg_IncomeTaxesPayableMember_057CE60E350492F2C895FD41850E6D68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_933BD1F6088AC898E045FD41850ED17E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_3B0970F85C5DADFDB9F2FD41850EA9A6" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_933BD1F6088AC898E045FD41850ED17E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_CAC7A13B922A4AF54017FD41850EA724" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_3B0970F85C5DADFDB9F2FD41850EA9A6" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_CAC7A13B922A4AF54017FD41850EA724" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent" xlink:label="loc_us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent_1CB11CAEED7964EE33EEFD41850EA16E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_3B0970F85C5DADFDB9F2FD41850EA9A6" xlink:to="loc_us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent_1CB11CAEED7964EE33EEFD41850EA16E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DueToRelatedPartiesCurrent" xlink:label="loc_us-gaap_DueToRelatedPartiesCurrent_6A43F8CB3B91356CDC0AFD41850E84D4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_3B0970F85C5DADFDB9F2FD41850EA9A6" xlink:to="loc_us-gaap_DueToRelatedPartiesCurrent_6A43F8CB3B91356CDC0AFD41850E84D4" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RelatedPartyTransactionsAndRelationshipsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/Revenue" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RevenueDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_E49D1F7E895D22CEBC7FEC8D4FE99719" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_A9F2B524E8F8701409EAEC8D4FE643F6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_E49D1F7E895D22CEBC7FEC8D4FE99719" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_A9F2B524E8F8701409EAEC8D4FE643F6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_6982CA98A8B13FBD4040EC8D4FE7FB1A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_A9F2B524E8F8701409EAEC8D4FE643F6" xlink:to="loc_srt_MajorCustomersAxis_6982CA98A8B13FBD4040EC8D4FE7FB1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_6982CA98A8B13FBD4040EC8D4FE7FB1A" xlink:to="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_6982CA98A8B13FBD4040EC8D4FE7FB1A" xlink:to="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ElectricUtilityCustomerClassResidentialMember" xlink:label="loc_evrg_ElectricUtilityCustomerClassResidentialMember_57FF2828D8B8B44FC197EC8D4FE7F76E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:to="loc_evrg_ElectricUtilityCustomerClassResidentialMember_57FF2828D8B8B44FC197EC8D4FE7F76E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ElectricUtilityCustomerClassCommercialMember" xlink:label="loc_evrg_ElectricUtilityCustomerClassCommercialMember_9B7B35B23ECD1EF767CCEC8D4FE72C24" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:to="loc_evrg_ElectricUtilityCustomerClassCommercialMember_9B7B35B23ECD1EF767CCEC8D4FE72C24" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ElectricUtilityCustomerClassIndustrialMember" xlink:label="loc_evrg_ElectricUtilityCustomerClassIndustrialMember_8472F1D8C8559D0BD564EC8D4FE7794B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:to="loc_evrg_ElectricUtilityCustomerClassIndustrialMember_8472F1D8C8559D0BD564EC8D4FE7794B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ElectricUtilityCustomerClassOtherRetailMember" xlink:label="loc_evrg_ElectricUtilityCustomerClassOtherRetailMember_4810401085392FFD0344EC8D4FE8E79F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:to="loc_evrg_ElectricUtilityCustomerClassOtherRetailMember_4810401085392FFD0344EC8D4FE8E79F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ElectricUtilityCustomerClassTotalElectricRetailMember" xlink:label="loc_evrg_ElectricUtilityCustomerClassTotalElectricRetailMember_21D0DCF5EA892AC5B5ECEC8D4FE88E11" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:to="loc_evrg_ElectricUtilityCustomerClassTotalElectricRetailMember_21D0DCF5EA892AC5B5ECEC8D4FE88E11" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ElectricUtilityCustomerClassWholesaleMember" xlink:label="loc_evrg_ElectricUtilityCustomerClassWholesaleMember_F3AFE7664EA567DA9F27EC8D4FE84F42" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:to="loc_evrg_ElectricUtilityCustomerClassWholesaleMember_F3AFE7664EA567DA9F27EC8D4FE84F42" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ElectricUtilityCustomerClassTransmissionMember" xlink:label="loc_evrg_ElectricUtilityCustomerClassTransmissionMember_E31CE18F57FE52F510FBEC8D4FE8A4B5" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:to="loc_evrg_ElectricUtilityCustomerClassTransmissionMember_E31CE18F57FE52F510FBEC8D4FE8A4B5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_ElectricUtilityCustomerClassIndustrialSteamMember" xlink:label="loc_evrg_ElectricUtilityCustomerClassIndustrialSteamMember_D62B495B5E85FB4A527BEC8D4FE8FB06" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_819FE0CBE8E9CFE824C7EC8D4FE7EAC1" xlink:to="loc_evrg_ElectricUtilityCustomerClassIndustrialSteamMember_D62B495B5E85FB4A527BEC8D4FE8FB06" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_E24DE6EA9F9347316388EC8D4FE87091" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_A9F2B524E8F8701409EAEC8D4FE643F6" xlink:to="loc_dei_LegalEntityAxis_E24DE6EA9F9347316388EC8D4FE87091" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_3203DB97F50FE6DBC21DEC8D4FE886CA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_E24DE6EA9F9347316388EC8D4FE87091" xlink:to="loc_dei_EntityDomain_3203DB97F50FE6DBC21DEC8D4FE886CA_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_3203DB97F50FE6DBC21DEC8D4FE886CA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_E24DE6EA9F9347316388EC8D4FE87091" xlink:to="loc_dei_EntityDomain_3203DB97F50FE6DBC21DEC8D4FE886CA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_6979D237B5FB7AB0A970EC8D4FE9C317" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3203DB97F50FE6DBC21DEC8D4FE886CA" xlink:to="loc_evrg_WestarEnergyIncMember_6979D237B5FB7AB0A970EC8D4FE9C317" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_8D1D4467ED9E54B76651EC8D4FE9EDCE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3203DB97F50FE6DBC21DEC8D4FE886CA" xlink:to="loc_evrg_KCPLMember_8D1D4467ED9E54B76651EC8D4FE9EDCE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_48F5C7DCDC917B1DAE35EC8D4FE98963" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_E49D1F7E895D22CEBC7FEC8D4FE99719" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_48F5C7DCDC917B1DAE35EC8D4FE98963" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherRevenue" xlink:label="loc_evrg_OtherRevenue_0F6E22C37A1912A15CF5EC8D4FEA284C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_E49D1F7E895D22CEBC7FEC8D4FE99719" xlink:to="loc_evrg_OtherRevenue_0F6E22C37A1912A15CF5EC8D4FEA284C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_A87864F6EA73E96A8C9EEC8D4FEA8D59" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_E49D1F7E895D22CEBC7FEC8D4FE99719" xlink:to="loc_us-gaap_Revenues_A87864F6EA73E96A8C9EEC8D4FEA8D59" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/RevenueTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompany" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_6E64E7648B0C27AC60A8E491FD3DBB7A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScheduleOfCondensedFinancialStatementsTable" xlink:label="loc_srt_ScheduleOfCondensedFinancialStatementsTable_4FEFDCA977F6820E6F65E491FD3CE9A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_6E64E7648B0C27AC60A8E491FD3DBB7A" xlink:to="loc_srt_ScheduleOfCondensedFinancialStatementsTable_4FEFDCA977F6820E6F65E491FD3CE9A8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_FE8D041D94B1BA0DD90BE491FD3DFFBA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ScheduleOfCondensedFinancialStatementsTable_4FEFDCA977F6820E6F65E491FD3CE9A8" xlink:to="loc_srt_ConsolidatedEntitiesAxis_FE8D041D94B1BA0DD90BE491FD3DFFBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_FF68BC1B4B97D3543D2AE491FD3D0CA0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_FE8D041D94B1BA0DD90BE491FD3DFFBA" xlink:to="loc_srt_ConsolidatedEntitiesDomain_FF68BC1B4B97D3543D2AE491FD3D0CA0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_FF68BC1B4B97D3543D2AE491FD3D0CA0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_FE8D041D94B1BA0DD90BE491FD3DFFBA" xlink:to="loc_srt_ConsolidatedEntitiesDomain_FF68BC1B4B97D3543D2AE491FD3D0CA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ParentCompanyMember" xlink:label="loc_srt_ParentCompanyMember_0CB2DCD2BC5D4C07CE44E491FD3DEF5B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_FF68BC1B4B97D3543D2AE491FD3D0CA0" xlink:to="loc_srt_ParentCompanyMember_0CB2DCD2BC5D4C07CE44E491FD3DEF5B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:label="loc_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A3B7F44D4426AF7CDA96E491FD3E7186" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6E64E7648B0C27AC60A8E491FD3DBB7A" xlink:to="loc_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A3B7F44D4426AF7CDA96E491FD3E7186" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompanyBalanceSheetDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_5641C6AF8EF6698F0238086B24D78163" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_6FEF0E5E999C37D52E09086B24D79804" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_5641C6AF8EF6698F0238086B24D78163" xlink:to="loc_us-gaap_StatementTable_6FEF0E5E999C37D52E09086B24D79804" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_0C10E904BE28299196E9086B24D75B6A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6FEF0E5E999C37D52E09086B24D79804" xlink:to="loc_dei_LegalEntityAxis_0C10E904BE28299196E9086B24D75B6A" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1A9455B8442C4A898997086B24D77BFF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_0C10E904BE28299196E9086B24D75B6A" xlink:to="loc_dei_EntityDomain_1A9455B8442C4A898997086B24D77BFF_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1A9455B8442C4A898997086B24D77BFF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_0C10E904BE28299196E9086B24D75B6A" xlink:to="loc_dei_EntityDomain_1A9455B8442C4A898997086B24D77BFF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_D57BFD7010D7415DC140086B24D79BA0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1A9455B8442C4A898997086B24D77BFF" xlink:to="loc_evrg_GreatPlainsEnergyMember_D57BFD7010D7415DC140086B24D79BA0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EvergyMember" xlink:label="loc_evrg_EvergyMember_4FA3BB2279496F8C2171086B24D72932" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1A9455B8442C4A898997086B24D77BFF" xlink:to="loc_evrg_EvergyMember_4FA3BB2279496F8C2171086B24D72932" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_15D80F5EAEF5A1544326086B24D7C620" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6FEF0E5E999C37D52E09086B24D79804" xlink:to="loc_us-gaap_StatementClassOfStockAxis_15D80F5EAEF5A1544326086B24D7C620" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_15D80F5EAEF5A1544326086B24D7C620" xlink:to="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_15D80F5EAEF5A1544326086B24D7C620" xlink:to="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PreferredStock3Point80Member" xlink:label="loc_evrg_PreferredStock3Point80Member_FA2C49EAAF2A525C94B4086B24D74E26" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B" xlink:to="loc_evrg_PreferredStock3Point80Member_FA2C49EAAF2A525C94B4086B24D74E26" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PreferredStock4Point50Member" xlink:label="loc_evrg_PreferredStock4Point50Member_363F9F99F03C1C5A26BA086B24D787EA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B" xlink:to="loc_evrg_PreferredStock4Point50Member_363F9F99F03C1C5A26BA086B24D787EA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PreferredStock4Point20Member" xlink:label="loc_evrg_PreferredStock4Point20Member_EEFACCCFE67F58349948086B24D78321" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B" xlink:to="loc_evrg_PreferredStock4Point20Member_EEFACCCFE67F58349948086B24D78321" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PreferredStock4Point35Member" xlink:label="loc_evrg_PreferredStock4Point35Member_E950C87663B6D878F597086B24D78CD1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B" xlink:to="loc_evrg_PreferredStock4Point35Member_E950C87663B6D878F597086B24D78CD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CumulativePreferredStockMember" xlink:label="loc_us-gaap_CumulativePreferredStockMember_306BF411390D5AC6968D086B24D7879F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B" xlink:to="loc_us-gaap_CumulativePreferredStockMember_306BF411390D5AC6968D086B24D7879F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConvertiblePreferredStockMember" xlink:label="loc_us-gaap_ConvertiblePreferredStockMember_CF0DE878B2E07056DC59086B24D7F11C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_04288A7D51A87D0D5376086B24D75A8B" xlink:to="loc_us-gaap_ConvertiblePreferredStockMember_CF0DE878B2E07056DC59086B24D7F11C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_EA75860A32BD71E710B0086B24D7EAB1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_5641C6AF8EF6698F0238086B24D78163" xlink:to="loc_us-gaap_AssetsAbstract_EA75860A32BD71E710B0086B24D7EAB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_B46B254D81E15EA839F7086B24D72B2B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_EA75860A32BD71E710B0086B24D7EAB1" xlink:to="loc_us-gaap_AssetsCurrentAbstract_B46B254D81E15EA839F7086B24D72B2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_CE1E62D97561A105E851086B24D77DAA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B46B254D81E15EA839F7086B24D72B2B" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_CE1E62D97561A105E851086B24D77DAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DueFromRelatedPartiesCurrent" xlink:label="loc_us-gaap_DueFromRelatedPartiesCurrent_569AFE521F04E6B6529E086B24D78814" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B46B254D81E15EA839F7086B24D72B2B" xlink:to="loc_us-gaap_DueFromRelatedPartiesCurrent_569AFE521F04E6B6529E086B24D78814" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotesReceivableRelatedPartiesCurrent" xlink:label="loc_us-gaap_NotesReceivableRelatedPartiesCurrent_C839773DF6C8BD3D25B7086B24D77580" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B46B254D81E15EA839F7086B24D72B2B" xlink:to="loc_us-gaap_NotesReceivableRelatedPartiesCurrent_C839773DF6C8BD3D25B7086B24D77580" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="loc_us-gaap_IncomeTaxesReceivable_52BE0E10AC481379F7D5086B24D7E285" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B46B254D81E15EA839F7086B24D72B2B" xlink:to="loc_us-gaap_IncomeTaxesReceivable_52BE0E10AC481379F7D5086B24D7E285" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_AAE9CEA3E47B7AD584B3086B24D71121" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B46B254D81E15EA839F7086B24D72B2B" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_AAE9CEA3E47B7AD584B3086B24D71121" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_690A4BF92262FE0475D1086B24D7DDE2" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_B46B254D81E15EA839F7086B24D72B2B" xlink:to="loc_us-gaap_AssetsCurrent_690A4BF92262FE0475D1086B24D7DDE2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InvestmentsAndOtherAssetsAbstract" xlink:label="loc_evrg_InvestmentsAndOtherAssetsAbstract_C9A14E6E98DCD696AA3E086B24D731AC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_EA75860A32BD71E710B0086B24D7EAB1" xlink:to="loc_evrg_InvestmentsAndOtherAssetsAbstract_C9A14E6E98DCD696AA3E086B24D731AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_75E81FA6F527F2A2C124086B24D74891" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_C9A14E6E98DCD696AA3E086B24D731AC" xlink:to="loc_us-gaap_EquityMethodInvestments_75E81FA6F527F2A2C124086B24D74891" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotesReceivableRelatedPartiesNoncurrent" xlink:label="loc_us-gaap_NotesReceivableRelatedPartiesNoncurrent_522100C1A703E7E98B5D086B24D7552B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_C9A14E6E98DCD696AA3E086B24D731AC" xlink:to="loc_us-gaap_NotesReceivableRelatedPartiesNoncurrent_522100C1A703E7E98B5D086B24D7552B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_E5254F9BD33DF60366A5086B24D77774" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_C9A14E6E98DCD696AA3E086B24D731AC" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_E5254F9BD33DF60366A5086B24D77774" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_FB6CA71A8C59E45BC6F5086B24E7FC0A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_C9A14E6E98DCD696AA3E086B24D731AC" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_FB6CA71A8C59E45BC6F5086B24E7FC0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaap_AssetsNoncurrent_6401C404A8CC1E05FBAB086B24E714E0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_InvestmentsAndOtherAssetsAbstract_C9A14E6E98DCD696AA3E086B24D731AC" xlink:to="loc_us-gaap_AssetsNoncurrent_6401C404A8CC1E05FBAB086B24E714E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_CB3499F8BF56DDF1B3FA086B24E784AA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_EA75860A32BD71E710B0086B24D7EAB1" xlink:to="loc_us-gaap_Assets_CB3499F8BF56DDF1B3FA086B24E784AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_58698FD40516BA1A9685086B24E7C1CA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_5641C6AF8EF6698F0238086B24D78163" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_58698FD40516BA1A9685086B24E7C1CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_DAEE5AA50C7DF9ABD39D086B24E7CFC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_58698FD40516BA1A9685086B24E7C1CA" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_DAEE5AA50C7DF9ABD39D086B24E7CFC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DueToRelatedPartiesCurrent" xlink:label="loc_us-gaap_DueToRelatedPartiesCurrent_E5FC9E1F37CEF6F7F72B086B24E7B1C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DAEE5AA50C7DF9ABD39D086B24E7CFC2" xlink:to="loc_us-gaap_DueToRelatedPartiesCurrent_E5FC9E1F37CEF6F7F72B086B24E7B1C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:label="loc_us-gaap_InterestPayableCurrent_8855822969C6651E40B6086B24E7955F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DAEE5AA50C7DF9ABD39D086B24E7CFC2" xlink:to="loc_us-gaap_InterestPayableCurrent_8855822969C6651E40B6086B24E7955F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxesPayableCurrent" xlink:label="loc_us-gaap_TaxesPayableCurrent_BEB4A382CE604CC68F60086B24E7BC60" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DAEE5AA50C7DF9ABD39D086B24E7CFC2" xlink:to="loc_us-gaap_TaxesPayableCurrent_BEB4A382CE604CC68F60086B24E7BC60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_EED68081ABA27BA4B57D086B24E7EEA7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DAEE5AA50C7DF9ABD39D086B24E7CFC2" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_EED68081ABA27BA4B57D086B24E7EEA7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_675CA9B39B03EF20ACCF086B24E71973" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DAEE5AA50C7DF9ABD39D086B24E7CFC2" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_675CA9B39B03EF20ACCF086B24E71973" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_1B8137F867331FA1A019086B24E7D351" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_DAEE5AA50C7DF9ABD39D086B24E7CFC2" xlink:to="loc_us-gaap_LiabilitiesCurrent_1B8137F867331FA1A019086B24E7D351" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_1FA3D5ABDA9C6BD53539086B24E7FFA0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_58698FD40516BA1A9685086B24E7C1CA" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_1FA3D5ABDA9C6BD53539086B24E7FFA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_0E94CAB625C19F25F529086B24E7B831" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_1FA3D5ABDA9C6BD53539086B24E7FFA0" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_0E94CAB625C19F25F529086B24E7B831" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_FFD4F8B49D2D7A842EFF086B24E73566" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_1FA3D5ABDA9C6BD53539086B24E7FFA0" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_FFD4F8B49D2D7A842EFF086B24E73566" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_A332248B8396E5E3CEF3086B24E78545" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_1FA3D5ABDA9C6BD53539086B24E7FFA0" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_A332248B8396E5E3CEF3086B24E78545" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalizationLongtermDebtAndEquityAbstract" xlink:label="loc_us-gaap_CapitalizationLongtermDebtAndEquityAbstract_A592FE4B284E90BBDC58086B24E79069" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_58698FD40516BA1A9685086B24E7C1CA" xlink:to="loc_us-gaap_CapitalizationLongtermDebtAndEquityAbstract_A592FE4B284E90BBDC58086B24E79069" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_873AEC4712340D059EDB086B24E7E02A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizationLongtermDebtAndEquityAbstract_A592FE4B284E90BBDC58086B24E79069" xlink:to="loc_us-gaap_CommonStockValue_873AEC4712340D059EDB086B24E7E02A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_D98F8D6B7F767E1D9382086B24E7DA71" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizationLongtermDebtAndEquityAbstract_A592FE4B284E90BBDC58086B24E79069" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_D98F8D6B7F767E1D9382086B24E7DA71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_E56F8B32E26C69D2DB4D086B24E7946B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizationLongtermDebtAndEquityAbstract_A592FE4B284E90BBDC58086B24E79069" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_E56F8B32E26C69D2DB4D086B24E7946B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_F3E7AAD419889AA66012086B24E75804" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CapitalizationLongtermDebtAndEquityAbstract_A592FE4B284E90BBDC58086B24E79069" xlink:to="loc_us-gaap_StockholdersEquity_F3E7AAD419889AA66012086B24E75804" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_E2FB47E328504819B5DB086B24E73F42" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_58698FD40516BA1A9685086B24E7C1CA" xlink:to="loc_us-gaap_CommitmentsAndContingencies_E2FB47E328504819B5DB086B24E73F42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_CBB15C357DC2AD09E0B5086B24E754CD" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_58698FD40516BA1A9685086B24E7C1CA" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_CBB15C357DC2AD09E0B5086B24E754CD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompanyBalanceSheetParentheticalDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_D0D5B10748ED25DF6FEF082E4D5FCD92" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_2298A4C859119991112D082E4D5DB529" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_D0D5B10748ED25DF6FEF082E4D5FCD92" xlink:to="loc_us-gaap_StatementTable_2298A4C859119991112D082E4D5DB529" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_5D744949112925006E1A082E4D5DCEB4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2298A4C859119991112D082E4D5DB529" xlink:to="loc_us-gaap_StatementClassOfStockAxis_5D744949112925006E1A082E4D5DCEB4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_E52754CF4DA772F816FB082E4D5EA222_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_5D744949112925006E1A082E4D5DCEB4" xlink:to="loc_us-gaap_ClassOfStockDomain_E52754CF4DA772F816FB082E4D5EA222_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_E52754CF4DA772F816FB082E4D5EA222" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_5D744949112925006E1A082E4D5DCEB4" xlink:to="loc_us-gaap_ClassOfStockDomain_E52754CF4DA772F816FB082E4D5EA222" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SeriesBPreferredStockMember" xlink:label="loc_us-gaap_SeriesBPreferredStockMember_1DEA8BE3612FA7D0A1C3082E4D5E4E05" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_E52754CF4DA772F816FB082E4D5EA222" xlink:to="loc_us-gaap_SeriesBPreferredStockMember_1DEA8BE3612FA7D0A1C3082E4D5E4E05" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_DD5A583507363579D1E2082E4D5E3E4A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2298A4C859119991112D082E4D5DB529" xlink:to="loc_dei_LegalEntityAxis_DD5A583507363579D1E2082E4D5E3E4A" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_CDE626E8302F7271A27F082E4D5E8645_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_DD5A583507363579D1E2082E4D5E3E4A" xlink:to="loc_dei_EntityDomain_CDE626E8302F7271A27F082E4D5E8645_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_CDE626E8302F7271A27F082E4D5E8645" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_DD5A583507363579D1E2082E4D5E3E4A" xlink:to="loc_dei_EntityDomain_CDE626E8302F7271A27F082E4D5E8645" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_CD11FF9BFF326D84E31E082E4D5F9CEC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_CDE626E8302F7271A27F082E4D5E8645" xlink:to="loc_evrg_GreatPlainsEnergyMember_CD11FF9BFF326D84E31E082E4D5F9CEC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EvergyMember" xlink:label="loc_evrg_EvergyMember_7E1214A27E032972AA4708370D0F4B6F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_CDE626E8302F7271A27F082E4D5E8645" xlink:to="loc_evrg_EvergyMember_7E1214A27E032972AA4708370D0F4B6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_564BAE2CD5B9AB0075F5082E4D605CD4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_D0D5B10748ED25DF6FEF082E4D5FCD92" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_564BAE2CD5B9AB0075F5082E4D605CD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_61A2051086E0954DE92A082E4D609F08" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_D0D5B10748ED25DF6FEF082E4D5FCD92" xlink:to="loc_us-gaap_CommonStockSharesIssued_61A2051086E0954DE92A082E4D609F08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_B4F8D7C9CCBCF5021DA3082E4D613DA0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_D0D5B10748ED25DF6FEF082E4D5FCD92" xlink:to="loc_us-gaap_PreferredStockSharesIssued_B4F8D7C9CCBCF5021DA3082E4D613DA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockLiquidationPreferenceValue" xlink:label="loc_us-gaap_PreferredStockLiquidationPreferenceValue_7C23BF73F9FF4D975683082E4D61DDA0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_D0D5B10748ED25DF6FEF082E4D5FCD92" xlink:to="loc_us-gaap_PreferredStockLiquidationPreferenceValue_7C23BF73F9FF4D975683082E4D61DDA0" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompanyStatementOfCashFlowsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_E631620A4DB27A79F47A08A0494EC89B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_7064A96224B4CF3CE68108A0494BB26D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_E631620A4DB27A79F47A08A0494EC89B" xlink:to="loc_us-gaap_StatementTable_7064A96224B4CF3CE68108A0494BB26D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_3CB6A8E6C7D38C26A14E08A0494C18BD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_7064A96224B4CF3CE68108A0494BB26D" xlink:to="loc_dei_LegalEntityAxis_3CB6A8E6C7D38C26A14E08A0494C18BD" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6CEA89B05F693A41F3EA08A0494DB3B6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3CB6A8E6C7D38C26A14E08A0494C18BD" xlink:to="loc_dei_EntityDomain_6CEA89B05F693A41F3EA08A0494DB3B6_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6CEA89B05F693A41F3EA08A0494DB3B6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3CB6A8E6C7D38C26A14E08A0494C18BD" xlink:to="loc_dei_EntityDomain_6CEA89B05F693A41F3EA08A0494DB3B6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_697F1B2D1779E65C2CE608A0494D2BE9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6CEA89B05F693A41F3EA08A0494DB3B6" xlink:to="loc_evrg_GreatPlainsEnergyMember_697F1B2D1779E65C2CE608A0494D2BE9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EvergyMember" xlink:label="loc_evrg_EvergyMember_656B8E537A26669290A608A0494E58E7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6CEA89B05F693A41F3EA08A0494DB3B6" xlink:to="loc_evrg_EvergyMember_656B8E537A26669290A608A0494E58E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_8D379F73B1FD01CFF72E08A0494E5759" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_7064A96224B4CF3CE68108A0494BB26D" xlink:to="loc_us-gaap_StatementScenarioAxis_8D379F73B1FD01CFF72E08A0494E5759" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_3343804A7FE00CF8B83F08A0494EB253_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_8D379F73B1FD01CFF72E08A0494E5759" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_3343804A7FE00CF8B83F08A0494EB253_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_3343804A7FE00CF8B83F08A0494EB253" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_8D379F73B1FD01CFF72E08A0494E5759" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_3343804A7FE00CF8B83F08A0494EB253" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E631620A4DB27A79F47A08A0494EC89B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_F41319E755A5868D221408A0494F6962" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:to="loc_us-gaap_ProfitLoss_F41319E755A5868D221408A0494F6962" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_FE3334E2EE3F9A382E5808A0494FEB63" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_FE3334E2EE3F9A382E5808A0494FEB63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_0C6C01D6ABAB1CC1B9B008A0494FEB49" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_FE3334E2EE3F9A382E5808A0494FEB63" xlink:to="loc_us-gaap_ShareBasedCompensation_0C6C01D6ABAB1CC1B9B008A0494FEB49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_1257F16CA6CCA28984AB08A049509731" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_FE3334E2EE3F9A382E5808A0494FEB63" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_1257F16CA6CCA28984AB08A049509731" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_8CFEEE5FB5922936FB5708A049508A86" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_FE3334E2EE3F9A382E5808A0494FEB63" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_8CFEEE5FB5922936FB5708A049508A86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2D6EBB7752EAE1CE1D208A049505387" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2D6EBB7752EAE1CE1D208A049505387" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInDueFromRelatedParties" xlink:label="loc_us-gaap_IncreaseDecreaseInDueFromRelatedParties_D40F1BEC62C38589A1C708A049506A78" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2D6EBB7752EAE1CE1D208A049505387" xlink:to="loc_us-gaap_IncreaseDecreaseInDueFromRelatedParties_D40F1BEC62C38589A1C708A049506A78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_4DE00BB160E994879A2908A049514299" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2D6EBB7752EAE1CE1D208A049505387" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_4DE00BB160E994879A2908A049514299" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties_9A34B564BD01634B8E3A08A04951A62F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2D6EBB7752EAE1CE1D208A049505387" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties_9A34B564BD01634B8E3A08A04951A62F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedTaxesPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedTaxesPayable_00C8959F13E23F1003EB08A0495113BE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2D6EBB7752EAE1CE1D208A049505387" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedTaxesPayable_00C8959F13E23F1003EB08A0495113BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_46AB8CE91FF91CD17BF008A049517849" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_F2D6EBB7752EAE1CE1D208A049505387" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_46AB8CE91FF91CD17BF008A049517849" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries" xlink:label="loc_us-gaap_CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries_EA27F5871B78ED753AED08A049514EE9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:to="loc_us-gaap_CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries_EA27F5871B78ED753AED08A049514EE9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_68A7CD181B1B395CE8CB08A04952F093" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_68A7CD181B1B395CE8CB08A04952F093" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7238A17A9E8495BA30F608A04952AE81" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7238A17A9E8495BA30F608A04952AE81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_69082C8652EEFF6DA31708A0495220D2" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_AB7B40FF565B773C853908A0494F402B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_69082C8652EEFF6DA31708A0495220D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_A56C5214C0FC84F2B2AC08A04952947D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E631620A4DB27A79F47A08A0494EC89B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_A56C5214C0FC84F2B2AC08A04952947D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_CE341487EDA300F704EC08A04952A605" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_A56C5214C0FC84F2B2AC08A04952947D" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_CE341487EDA300F704EC08A04952A605" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities" xlink:label="loc_us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities_F895D8544F59F2BD31B708A04953FAFD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_A56C5214C0FC84F2B2AC08A04952947D" xlink:to="loc_us-gaap_ProceedsFromDerivativeInstrumentInvestingActivities_F895D8544F59F2BD31B708A04953FAFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates" xlink:label="loc_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_5E5DA374B7072714F2B908A049535F47" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_A56C5214C0FC84F2B2AC08A04952947D" xlink:to="loc_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_5E5DA374B7072714F2B908A049535F47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_30D19629245E3FD95FBC08A049530738" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_A56C5214C0FC84F2B2AC08A04952947D" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_30D19629245E3FD95FBC08A049530738" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_710ADFFFC085D2B8442308A0495349A4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_A56C5214C0FC84F2B2AC08A04952947D" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_710ADFFFC085D2B8442308A0495349A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E631620A4DB27A79F47A08A0494EC89B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_11A2E6533BC56848F51208A049544F73" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_11A2E6533BC56848F51208A049544F73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock_C4D930F2FE85064478A308A049540EC4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock_C4D930F2FE85064478A308A049540EC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_F73B8B6B48524A0D6C5D08A04954DE56" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_F73B8B6B48524A0D6C5D08A04954DE56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_94ABB5C2237AD8DE349308A049544E7E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_94ABB5C2237AD8DE349308A049544E7E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_63C6D39116699229E63F08A0495432EB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_63C6D39116699229E63F08A0495432EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_378B44B1EE8F5F3149C508A0495502AC" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_PaymentsOfDividends_378B44B1EE8F5F3149C508A0495502AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_FB7B957B2974696975BD08A04955FC68" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_FB7B957B2974696975BD08A04955FC68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_5A2161CFB67575150BB708A0495598E7" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_5A2161CFB67575150BB708A0495598E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_FD90F65218A7498A696008A04955444B" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_363CA5B1B48A7430EA9008A04953FF18" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_FD90F65218A7498A696008A04955444B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_8283FEA8B13CE3B0A57308A0495500B9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E631620A4DB27A79F47A08A0494EC89B" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_8283FEA8B13CE3B0A57308A0495500B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_9FC4ECE7A6B95AF1856908A04955B306" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E631620A4DB27A79F47A08A0494EC89B" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_9FC4ECE7A6B95AF1856908A04955B306" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ScheduleIFinancialStatementsOfParentCompanyStatementsOfIncomeOciDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_FEFAA555F173C49EE244077EE483366B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_StatementTable_FEFAA555F173C49EE244077EE483366B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_3BC6C69E05A8E3449CBF077EE48306BA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_FEFAA555F173C49EE244077EE483366B" xlink:to="loc_dei_LegalEntityAxis_3BC6C69E05A8E3449CBF077EE48306BA" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_17C07FA3A05F24AF3D91077EE4842711_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3BC6C69E05A8E3449CBF077EE48306BA" xlink:to="loc_dei_EntityDomain_17C07FA3A05F24AF3D91077EE4842711_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_17C07FA3A05F24AF3D91077EE4842711" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3BC6C69E05A8E3449CBF077EE48306BA" xlink:to="loc_dei_EntityDomain_17C07FA3A05F24AF3D91077EE4842711" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EvergyMember" xlink:label="loc_evrg_EvergyMember_EDA66C4FB5CCF70C8243077EE484AF57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_17C07FA3A05F24AF3D91077EE4842711" xlink:to="loc_evrg_EvergyMember_EDA66C4FB5CCF70C8243077EE484AF57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_8C7194B37C2F4FE871D0077EE48432C6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_FEFAA555F173C49EE244077EE483366B" xlink:to="loc_srt_ConsolidatedEntitiesAxis_8C7194B37C2F4FE871D0077EE48432C6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_232C02039B8AA2525EC4077EE48523B8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8C7194B37C2F4FE871D0077EE48432C6" xlink:to="loc_srt_ConsolidatedEntitiesDomain_232C02039B8AA2525EC4077EE48523B8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_232C02039B8AA2525EC4077EE48523B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8C7194B37C2F4FE871D0077EE48432C6" xlink:to="loc_srt_ConsolidatedEntitiesDomain_232C02039B8AA2525EC4077EE48523B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ParentCompanyMember" xlink:label="loc_srt_ParentCompanyMember_1DAD85525797786D9ED6077EE4850F0A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_232C02039B8AA2525EC4077EE48523B8" xlink:to="loc_srt_ParentCompanyMember_1DAD85525797786D9ED6077EE4850F0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_0502EF5503D58E117EEE077EE4864F2C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_0502EF5503D58E117EEE077EE4864F2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_E6947F647317D6BEA559077EE485472D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_0502EF5503D58E117EEE077EE4864F2C" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_E6947F647317D6BEA559077EE485472D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_2A6D2FF47476469407C907FAB7AC7725" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_0502EF5503D58E117EEE077EE4864F2C" xlink:to="loc_us-gaap_CostsAndExpenses_2A6D2FF47476469407C907FAB7AC7725" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_3E5F02C834E81F21C78E077EE4876DB3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_OperatingIncomeLoss_3E5F02C834E81F21C78E077EE4876DB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_AFB6BA84DEDB591CF81C077EE487CECC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_OtherIncomeAndExpensesAbstract_AFB6BA84DEDB591CF81C077EE487CECC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_5247ECA9F87D2F7715F4077EE487449C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_AFB6BA84DEDB591CF81C077EE487CECC" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_5247ECA9F87D2F7715F4077EE487449C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="loc_us-gaap_InvestmentIncomeNonoperating_22B3D28094A128988FED077EE4870CAB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_AFB6BA84DEDB591CF81C077EE487CECC" xlink:to="loc_us-gaap_InvestmentIncomeNonoperating_22B3D28094A128988FED077EE4870CAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="loc_us-gaap_OtherNonoperatingExpense_0974F47F5330606C123A077EE4880F43" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_AFB6BA84DEDB591CF81C077EE487CECC" xlink:to="loc_us-gaap_OtherNonoperatingExpense_0974F47F5330606C123A077EE4880F43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_3BAD3DF225977EE65A61077EE4887321" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_AFB6BA84DEDB591CF81C077EE487CECC" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_3BAD3DF225977EE65A61077EE4887321" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_201E9DDD768B9C06B069077EE4885E41" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_InterestExpense_201E9DDD768B9C06B069077EE4885E41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_966ED97897A364525853077EE489FBCA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_966ED97897A364525853077EE489FBCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_DA92A64BB4468C36A6B2077EE48993C4" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_DA92A64BB4468C36A6B2077EE48993C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_13AF4236B58C60174E5107F1A7CEB1F9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_ProfitLoss_13AF4236B58C60174E5107F1A7CEB1F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_3261AE8121D2BC9B57EB077EE4C91F15" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0F3E409D5FFD90383F71077EE485F080" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_3261AE8121D2BC9B57EB077EE4C91F15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_3261AE8121D2BC9B57EB077EE4C91F15" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_E1A72CED83D3102E61C8077EE4C9B7F7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_E1A72CED83D3102E61C8077EE4C9B7F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_2D6ACC795C3F5F21B0CC077EE4CADEC1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_2D6ACC795C3F5F21B0CC077EE4CADEC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_27204256577711B4C4F5077EE4CAA8BF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_27204256577711B4C4F5077EE4CAA8BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax_8ACD2A5F4738E79A87DF077EE4CA7213" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax_8ACD2A5F4738E79A87DF077EE4CA7213" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax_9A15A94A0DF35010252D077EE4CA9900" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax_9A15A94A0DF35010252D077EE4CA9900" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax_51C4B5CBE6A2F62E5804077EE4CA49F4" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax_51C4B5CBE6A2F62E5804077EE4CA49F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_62C1FBA70DA67D54E3B9077EE4CA9081" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_62C1FBA70DA67D54E3B9077EE4CA9081" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_8370B2B50FEDA5DB49BC077EE4CAAEE6" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_8370B2B50FEDA5DB49BC077EE4CAAEE6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OtherComprehensiveIncomeFromSubsidiariesNetOfTax" xlink:label="loc_evrg_OtherComprehensiveIncomeFromSubsidiariesNetOfTax_4E5369ABD5E413F1FFA1077EE4CBFA48" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_evrg_OtherComprehensiveIncomeFromSubsidiariesNetOfTax_4E5369ABD5E413F1FFA1077EE4CBFA48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3F45076805617D8BC56B077EE4CB375E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_9D129EF9C0BAB13AA63E077EE4C9919C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3F45076805617D8BC56B077EE4CB375E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_FF85647EDFF4E966CAEC077EE4CB7C64" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_3261AE8121D2BC9B57EB077EE4C91F15" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_FF85647EDFF4E966CAEC077EE4CB7C64" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ScheduleIiValuationAndQualifyingAccounts" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ScheduleIiValuationAndQualifyingAccountsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6B1637F1A92CA41C93F7ED54CD16F5C2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_E7BE9A9D4C91F31E84F0ED54CD14A0EE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6B1637F1A92CA41C93F7ED54CD16F5C2" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_E7BE9A9D4C91F31E84F0ED54CD14A0EE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_1F646B5DC78F2B0C0F6DED54CD145FEE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_E7BE9A9D4C91F31E84F0ED54CD14A0EE" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_1F646B5DC78F2B0C0F6DED54CD145FEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_357F2007D068588E28D0ED54CD140256_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_1F646B5DC78F2B0C0F6DED54CD145FEE" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_357F2007D068588E28D0ED54CD140256_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_357F2007D068588E28D0ED54CD140256" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_1F646B5DC78F2B0C0F6DED54CD145FEE" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_357F2007D068588E28D0ED54CD140256" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForCreditLossMember" xlink:label="loc_us-gaap_AllowanceForCreditLossMember_0D6182A6FCBDB8DFC32EED54CD152A26" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_357F2007D068588E28D0ED54CD140256" xlink:to="loc_us-gaap_AllowanceForCreditLossMember_0D6182A6FCBDB8DFC32EED54CD152A26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember" xlink:label="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_9C517FAC3A97E6727DCAED54CD154CBC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_357F2007D068588E28D0ED54CD140256" xlink:to="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_9C517FAC3A97E6727DCAED54CD154CBC" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_3A939609B0B349C2190FED54CD168828" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_E7BE9A9D4C91F31E84F0ED54CD14A0EE" xlink:to="loc_dei_LegalEntityAxis_3A939609B0B349C2190FED54CD168828" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_CEA4580D3F82CD122836ED54CD167AE4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3A939609B0B349C2190FED54CD168828" xlink:to="loc_dei_EntityDomain_CEA4580D3F82CD122836ED54CD167AE4_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_CEA4580D3F82CD122836ED54CD167AE4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3A939609B0B349C2190FED54CD168828" xlink:to="loc_dei_EntityDomain_CEA4580D3F82CD122836ED54CD167AE4" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_061FCAE00B2D115B5136ED68279A8573" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_CEA4580D3F82CD122836ED54CD167AE4" xlink:to="loc_evrg_WestarEnergyIncMember_061FCAE00B2D115B5136ED68279A8573" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_FE0053FFF17B33497C10ED54CD169E6B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_CEA4580D3F82CD122836ED54CD167AE4" xlink:to="loc_evrg_KCPLMember_FE0053FFF17B33497C10ED54CD169E6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_21537889DAD29922654EED54CD169E88" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6B1637F1A92CA41C93F7ED54CD16F5C2" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_21537889DAD29922654EED54CD169E88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_0293F8DCD0CF6DD0DEE9ED54CD17F6F2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6B1637F1A92CA41C93F7ED54CD16F5C2" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_0293F8DCD0CF6DD0DEE9ED54CD17F6F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts_7165CDE46D9068AD2825ED54CD175AAE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6B1637F1A92CA41C93F7ED54CD16F5C2" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts_7165CDE46D9068AD2825ED54CD175AAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_1AB3DE8B84F1E2906CC1ED54CD17F45E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6B1637F1A92CA41C93F7ED54CD16F5C2" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_1AB3DE8B84F1E2906CC1ED54CD17F45E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ShareholdersEquity" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ShareholdersEquityDetails" xlink:type="extended">
    <link:loc xlink:href="evrg-20181231.xsd#evrg_CommonShareholdersEquityLineItems" xlink:label="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_5D7F4ECE11213C95ABC5FD4C03EC4B9F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_StatementTable_5D7F4ECE11213C95ABC5FD4C03EC4B9F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_E84E6617017C557DBB07FD4C03ECB8AC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5D7F4ECE11213C95ABC5FD4C03EC4B9F" xlink:to="loc_srt_RangeAxis_E84E6617017C557DBB07FD4C03ECB8AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_4434809BA77B743A9C28FD4C03EC0957_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_E84E6617017C557DBB07FD4C03ECB8AC" xlink:to="loc_srt_RangeMember_4434809BA77B743A9C28FD4C03EC0957_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_4434809BA77B743A9C28FD4C03EC0957" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_E84E6617017C557DBB07FD4C03ECB8AC" xlink:to="loc_srt_RangeMember_4434809BA77B743A9C28FD4C03EC0957" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_3F34355F6D7DF7A46D9FFD4C03ED8BCE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4434809BA77B743A9C28FD4C03EC0957" xlink:to="loc_srt_MinimumMember_3F34355F6D7DF7A46D9FFD4C03ED8BCE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_CBFD1F31B738F4BC52F8FD4C03ED6695" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4434809BA77B743A9C28FD4C03EC0957" xlink:to="loc_srt_MaximumMember_CBFD1F31B738F4BC52F8FD4C03ED6695" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_96412A08CBF9E0766DAEFD4C03ED13F3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5D7F4ECE11213C95ABC5FD4C03EC4B9F" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_96412A08CBF9E0766DAEFD4C03ED13F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_28472BDFAC9C0FB21FB4FD4C03EDBB5F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_96412A08CBF9E0766DAEFD4C03ED13F3" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_28472BDFAC9C0FB21FB4FD4C03EDBB5F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_28472BDFAC9C0FB21FB4FD4C03EDBB5F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_96412A08CBF9E0766DAEFD4C03ED13F3" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_28472BDFAC9C0FB21FB4FD4C03EDBB5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_2FE2CE0B6F91D2BAB83AFD4C03EE55F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_28472BDFAC9C0FB21FB4FD4C03EDBB5F" xlink:to="loc_us-gaap_SubsequentEventMember_2FE2CE0B6F91D2BAB83AFD4C03EE55F1" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_47761EB863CE92D31CFDFD4C03EE59B5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5D7F4ECE11213C95ABC5FD4C03EC4B9F" xlink:to="loc_dei_LegalEntityAxis_47761EB863CE92D31CFDFD4C03EE59B5" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_47761EB863CE92D31CFDFD4C03EE59B5" xlink:to="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_47761EB863CE92D31CFDFD4C03EE59B5" xlink:to="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyandKCPLReceivablesCompanyMember" xlink:label="loc_evrg_WestarEnergyandKCPLReceivablesCompanyMember_7BDDF5F8E1DC19AF8CCDFD4C03EF212D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167" xlink:to="loc_evrg_WestarEnergyandKCPLReceivablesCompanyMember_7BDDF5F8E1DC19AF8CCDFD4C03EF212D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLReceivablesCompanyMember" xlink:label="loc_evrg_KCPLReceivablesCompanyMember_B8E1333180B45C4FD78DFD4C03EF9474" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167" xlink:to="loc_evrg_KCPLReceivablesCompanyMember_B8E1333180B45C4FD78DFD4C03EF9474" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_4CEFA7D7BC2C54D9C4D0FD4C03EFE202" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167" xlink:to="loc_evrg_WestarEnergyIncMember_4CEFA7D7BC2C54D9C4D0FD4C03EFE202" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_A80C97931EA0A45370F7FD4C03EFC4C1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167" xlink:to="loc_evrg_KCPLMember_A80C97931EA0A45370F7FD4C03EFC4C1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EvergyMember" xlink:label="loc_evrg_EvergyMember_03D1B1DF3E0CC83BD321FD4C03EFD367" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167" xlink:to="loc_evrg_EvergyMember_03D1B1DF3E0CC83BD321FD4C03EFD367" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_A62C1D1182F1C8F33843FD4C03EF4829" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_AEC457096B3454E3C092FD4C03EEB167" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_A62C1D1182F1C8F33843FD4C03EF4829" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_A86CA092AE827B93BFCDFD4C03F0608D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5D7F4ECE11213C95ABC5FD4C03EC4B9F" xlink:to="loc_us-gaap_CreditFacilityAxis_A86CA092AE827B93BFCDFD4C03F0608D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_75D6F1AC1626144F106CFD4C03F061D5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_A86CA092AE827B93BFCDFD4C03F0608D" xlink:to="loc_us-gaap_CreditFacilityDomain_75D6F1AC1626144F106CFD4C03F061D5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_75D6F1AC1626144F106CFD4C03F061D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_A86CA092AE827B93BFCDFD4C03F0608D" xlink:to="loc_us-gaap_CreditFacilityDomain_75D6F1AC1626144F106CFD4C03F061D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_295DAFD7DD732C0EDA95FD4C03F01402" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_75D6F1AC1626144F106CFD4C03F061D5" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_295DAFD7DD732C0EDA95FD4C03F01402" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_9E2AF2E306BC93729987FD4C03F1B7A6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_9E2AF2E306BC93729987FD4C03F1B7A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_E82B92D4BDCA65A5FD2FFD4C03F12551" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_E82B92D4BDCA65A5FD2FFD4C03F12551" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_F96E027CC3B1C3842BAFFD4C03F14565" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_F96E027CC3B1C3842BAFFD4C03F14565" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased" xlink:label="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_7A9B18A3BDA60F80774CFD4C03F1805A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_7A9B18A3BDA60F80774CFD4C03F1805A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_3939CC18FF512F877B55FD4C03F2823F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_3939CC18FF512F877B55FD4C03F2823F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_9EFF2000B6E2074B72F6FD4C03F27687" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_9EFF2000B6E2074B72F6FD4C03F27687" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_StockRepurchasedAndRetiredDuringPeriodUnderRepurchasePlanValue" xlink:label="loc_evrg_StockRepurchasedAndRetiredDuringPeriodUnderRepurchasePlanValue_ADF6710D27B813EAB2A9FD4C03F26EC9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_evrg_StockRepurchasedAndRetiredDuringPeriodUnderRepurchasePlanValue_ADF6710D27B813EAB2A9FD4C03F26EC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_288D36A2EA88AE5434FEFD4C03F21756" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_288D36A2EA88AE5434FEFD4C03F21756" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt" xlink:label="loc_us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt_ED4C6CE46819E9EE9257FD4C03F2C1F1" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_AcceleratedShareRepurchasesSettlementPaymentOrReceipt_ED4C6CE46819E9EE9257FD4C03F2C1F1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PartialSettlementOfAcceleratedShareRepurchaseAgreementShares" xlink:label="loc_evrg_PartialSettlementOfAcceleratedShareRepurchaseAgreementShares_578A12341E20E8831954FD4C03F2E0F1" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_evrg_PartialSettlementOfAcceleratedShareRepurchaseAgreementShares_578A12341E20E8831954FD4C03F2E0F1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FinalSettlementOfAcceleratedShareRepurchaseAgreementShares" xlink:label="loc_evrg_FinalSettlementOfAcceleratedShareRepurchaseAgreementShares_D5EC1CC5D1BE3ACDBC8AFD4C03F3AE67" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_evrg_FinalSettlementOfAcceleratedShareRepurchaseAgreementShares_D5EC1CC5D1BE3ACDBC8AFD4C03F3AE67" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RestrictiononPaymentofDividendsMinimumRatioofEquitytoCapitalization" xlink:label="loc_evrg_RestrictiononPaymentofDividendsMinimumRatioofEquitytoCapitalization_8DF757A231AC6A5D6F8EFD4C03F33BEF" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_evrg_RestrictiononPaymentofDividendsMinimumRatioofEquitytoCapitalization_8DF757A231AC6A5D6F8EFD4C03F33BEF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtInstrumentCovenantDebttoCapitalizationRatio" xlink:label="loc_evrg_DebtInstrumentCovenantDebttoCapitalizationRatio_902722D902B07A33311CFD4C03F322BF" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_evrg_DebtInstrumentCovenantDebttoCapitalizationRatio_902722D902B07A33311CFD4C03F322BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityRestrictions" xlink:label="loc_us-gaap_EquityRestrictions_1F747358AAAFCDF2A81BFD4C03F30A4F" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_EquityRestrictions_1F747358AAAFCDF2A81BFD4C03F30A4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries" xlink:label="loc_us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries_3BC3B31775B9550F81ADFD4C03F38C68" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries_3BC3B31775B9550F81ADFD4C03F38C68" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AdditionalSharesFromEarlyASRSettlement" xlink:label="loc_evrg_AdditionalSharesFromEarlyASRSettlement_DA22F48F2A4BDE2ECD8CFD4C03F4ED58" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_CommonShareholdersEquityLineItems_D41F6E1488928B288E3AFD4C03F11331" xlink:to="loc_evrg_AdditionalSharesFromEarlyASRSettlement_DA22F48F2A4BDE2ECD8CFD4C03F4ED58" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ShortTermBorrowingsAndShortTermBankLinesOfCredit" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ShortTermBorrowingsAndShortTermBankLinesOfCreditDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_B33FC18899B484E55D13F2EBD860E6B7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_B33FC18899B484E55D13F2EBD860E6B7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_A9B58678BB22466C05C1F2EBD860386F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_B33FC18899B484E55D13F2EBD860E6B7" xlink:to="loc_us-gaap_DebtInstrumentAxis_A9B58678BB22466C05C1F2EBD860386F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_BF27A890CC436FEE988FF2EBD8603851_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_A9B58678BB22466C05C1F2EBD860386F" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_BF27A890CC436FEE988FF2EBD8603851_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_BF27A890CC436FEE988FF2EBD8603851" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_A9B58678BB22466C05C1F2EBD860386F" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_BF27A890CC436FEE988FF2EBD8603851" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WesterEnergyRevolvingCreditFacilityOneMember" xlink:label="loc_evrg_WesterEnergyRevolvingCreditFacilityOneMember_90C139182CA3BFC20E2CF2EBD86034B5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_BF27A890CC436FEE988FF2EBD8603851" xlink:to="loc_evrg_WesterEnergyRevolvingCreditFacilityOneMember_90C139182CA3BFC20E2CF2EBD86034B5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WesterEnergyRevolvingCreditFacilityTwoMember" xlink:label="loc_evrg_WesterEnergyRevolvingCreditFacilityTwoMember_70811FD589188E8F243AF2EBD8605D23" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_BF27A890CC436FEE988FF2EBD8603851" xlink:to="loc_evrg_WesterEnergyRevolvingCreditFacilityTwoMember_70811FD589188E8F243AF2EBD8605D23" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_F97DBEE2A063435F7A52F2EBD860B616" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_B33FC18899B484E55D13F2EBD860E6B7" xlink:to="loc_dei_LegalEntityAxis_F97DBEE2A063435F7A52F2EBD860B616" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_F97DBEE2A063435F7A52F2EBD860B616" xlink:to="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_F97DBEE2A063435F7A52F2EBD860B616" xlink:to="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EvergyMember" xlink:label="loc_evrg_EvergyMember_00C775C8D627EBCA2EC5F2EBD860FEAF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E" xlink:to="loc_evrg_EvergyMember_00C775C8D627EBCA2EC5F2EBD860FEAF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_029F01783E24BAF29CD5F2EBD860EE3D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E" xlink:to="loc_evrg_KCPLMember_029F01783E24BAF29CD5F2EBD860EE3D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GreatPlainsEnergyMember" xlink:label="loc_evrg_GreatPlainsEnergyMember_8B99AAD8FBC82FDEC7AFF2EBD8607FC0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E" xlink:to="loc_evrg_GreatPlainsEnergyMember_8B99AAD8FBC82FDEC7AFF2EBD8607FC0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_A07AFCB3282E0D895F65F2EBD8604B7B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E" xlink:to="loc_evrg_WestarEnergyIncMember_A07AFCB3282E0D895F65F2EBD8604B7B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_C123249A753A0655E47BF2EBD860D600" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_42E401CEF5059491C098F2EBD8608A8E" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_C123249A753A0655E47BF2EBD860D600" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_F19EF4662FFC8E90344DF2EBD86092CA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_B33FC18899B484E55D13F2EBD860E6B7" xlink:to="loc_us-gaap_CreditFacilityAxis_F19EF4662FFC8E90344DF2EBD86092CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1C8C61A2D0A301DBFBECF2EBD860E4B1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_F19EF4662FFC8E90344DF2EBD86092CA" xlink:to="loc_us-gaap_CreditFacilityDomain_1C8C61A2D0A301DBFBECF2EBD860E4B1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_1C8C61A2D0A301DBFBECF2EBD860E4B1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_F19EF4662FFC8E90344DF2EBD86092CA" xlink:to="loc_us-gaap_CreditFacilityDomain_1C8C61A2D0A301DBFBECF2EBD860E4B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_EEB10EAD77FFB6C18FAAF2EBD860ECEF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1C8C61A2D0A301DBFBECF2EBD860E4B1" xlink:to="loc_us-gaap_CommercialPaperMember_EEB10EAD77FFB6C18FAAF2EBD860ECEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StandbyLettersOfCreditMember" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_0B8051CAF03FEC10B818F2EBD864D22A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1C8C61A2D0A301DBFBECF2EBD860E4B1" xlink:to="loc_us-gaap_StandbyLettersOfCreditMember_0B8051CAF03FEC10B818F2EBD864D22A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_B03E22FE3120C98DD1EBF2EBD8641EC9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1C8C61A2D0A301DBFBECF2EBD860E4B1" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_B03E22FE3120C98DD1EBF2EBD8641EC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_3E1874FFF3C458169DF7F2EBD864C84F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_B33FC18899B484E55D13F2EBD860E6B7" xlink:to="loc_srt_RangeAxis_3E1874FFF3C458169DF7F2EBD864C84F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_A89D678EEA27281055A2F2EBD864C40B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_3E1874FFF3C458169DF7F2EBD864C84F" xlink:to="loc_srt_RangeMember_A89D678EEA27281055A2F2EBD864C40B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_A89D678EEA27281055A2F2EBD864C40B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_3E1874FFF3C458169DF7F2EBD864C84F" xlink:to="loc_srt_RangeMember_A89D678EEA27281055A2F2EBD864C40B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_D5BB03D385063037D42DF2EBD864E173" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_A89D678EEA27281055A2F2EBD864C40B" xlink:to="loc_srt_MaximumMember_D5BB03D385063037D42DF2EBD864E173" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_BDEC058E3AEB1C0FE285F2EBD8645254" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_A89D678EEA27281055A2F2EBD864C40B" xlink:to="loc_srt_MinimumMember_BDEC058E3AEB1C0FE285F2EBD8645254" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LineOfCreditExpired" xlink:label="loc_evrg_LineOfCreditExpired_62A88B6DFBB45DF7EAA0F2EBD86467CB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_evrg_LineOfCreditExpired_62A88B6DFBB45DF7EAA0F2EBD86467CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_754424DC1E4AC2F4C9B5F2EBD8645E59" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_754424DC1E4AC2F4C9B5F2EBD8645E59" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtInstrumentDebtDefaultThreshold" xlink:label="loc_evrg_DebtInstrumentDebtDefaultThreshold_5363F74AE8C3A34C9814F2EBD8647C8B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_evrg_DebtInstrumentDebtDefaultThreshold_5363F74AE8C3A34C9814F2EBD8647C8B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DebtInstrumentCovenantDebttoCapitalizationRatio" xlink:label="loc_evrg_DebtInstrumentCovenantDebttoCapitalizationRatio_4CA93AA547F560F4C1C6F2EBD8645814" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_evrg_DebtInstrumentCovenantDebttoCapitalizationRatio_4CA93AA547F560F4C1C6F2EBD8645814" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_CB333C15E8AE7547B9DDF2EBD864DF88" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LineOfCredit_CB333C15E8AE7547B9DDF2EBD864DF88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_3D5BCDA8604F2DC8383BF2EBD8644A5C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_3D5BCDA8604F2DC8383BF2EBD8644A5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_642CE656BFB1D8511395F2EBD8642546" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_642CE656BFB1D8511395F2EBD8642546" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityCovenantTerms" xlink:label="loc_us-gaap_LineOfCreditFacilityCovenantTerms_96A115BD831898A6FDFAF2EBD864220D" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LineOfCreditFacilityCovenantTerms_96A115BD831898A6FDFAF2EBD864220D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="loc_us-gaap_LineOfCreditFacilityExpirationDate1_D273771402F1F56E2DC7F2EBD8644F3B" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LineOfCreditFacilityExpirationDate1_D273771402F1F56E2DC7F2EBD8644F3B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LineOfCreditFacilityMaximumBorrowingCapacityWithTransferOfUnusedCommitments" xlink:label="loc_evrg_LineOfCreditFacilityMaximumBorrowingCapacityWithTransferOfUnusedCommitments_645B3C06327E49FBD879F2EBD864B7F0" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_evrg_LineOfCreditFacilityMaximumBorrowingCapacityWithTransferOfUnusedCommitments_645B3C06327E49FBD879F2EBD864B7F0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LineOfCreditFacilityMaximumTransferOfUnusedCommitments" xlink:label="loc_evrg_LineOfCreditFacilityMaximumTransferOfUnusedCommitments_80D5ED1CB835083BBE52F2EBD8643263" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_evrg_LineOfCreditFacilityMaximumTransferOfUnusedCommitments_80D5ED1CB835083BBE52F2EBD8643263" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityCovenantCompliance" xlink:label="loc_us-gaap_LineOfCreditFacilityCovenantCompliance_4D3F7187538FCDDAE431F2EBD8648A15" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LineOfCreditFacilityCovenantCompliance_4D3F7187538FCDDAE431F2EBD8648A15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_95B7014250EDF7CEFB10F2EBD86496CA" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_95B7014250EDF7CEFB10F2EBD86496CA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LineofCreditFacilityAmountExpired" xlink:label="loc_evrg_LineofCreditFacilityAmountExpired_DEFF95DE6B72B4532E1EF2EBD8644011" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_evrg_LineofCreditFacilityAmountExpired_DEFF95DE6B72B4532E1EF2EBD8644011" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_468B22F3F94C4E5D1DF8F2EBD868F8A2" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_9704848B2E5C24F85C7EF2EBD8646B64" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_468B22F3F94C4E5D1DF8F2EBD868F8A2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/ShortTermBorrowingsAndShortTermBankLinesOfCreditTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesAllowanceForFundsUsedDuringConstructionDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_059CC9A03990AA395B190B105741E4D6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A0698CA0E3246F3F82AE0B10573D37BA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_059CC9A03990AA395B190B105741E4D6" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A0698CA0E3246F3F82AE0B10573D37BA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_DD993BE5E5895FF424CA0B10573EBE33" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A0698CA0E3246F3F82AE0B10573D37BA" xlink:to="loc_dei_LegalEntityAxis_DD993BE5E5895FF424CA0B10573EBE33" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1BB00DEBAEA4E473EEBA0B10573F60E6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_DD993BE5E5895FF424CA0B10573EBE33" xlink:to="loc_dei_EntityDomain_1BB00DEBAEA4E473EEBA0B10573F60E6_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1BB00DEBAEA4E473EEBA0B10573F60E6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_DD993BE5E5895FF424CA0B10573EBE33" xlink:to="loc_dei_EntityDomain_1BB00DEBAEA4E473EEBA0B10573F60E6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_5834F158C824C3CB6F3A0B10573FFDC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1BB00DEBAEA4E473EEBA0B10573F60E6" xlink:to="loc_evrg_WestarEnergyIncMember_5834F158C824C3CB6F3A0B10573FFDC6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_AE0240FF26A9F30730A50B1057402081" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1BB00DEBAEA4E473EEBA0B10573F60E6" xlink:to="loc_evrg_KCPLMember_AE0240FF26A9F30730A50B1057402081" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_D52E135000A2D48CE5FB0B1057401A54" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1BB00DEBAEA4E473EEBA0B10573F60E6" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_D52E135000A2D48CE5FB0B1057401A54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_FADA3B987BE2BA70AFB90B1057405049" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A0698CA0E3246F3F82AE0B10573D37BA" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_FADA3B987BE2BA70AFB90B1057405049" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_76B70F975FE495F50B5D0B10574067B9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_FADA3B987BE2BA70AFB90B1057405049" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_76B70F975FE495F50B5D0B10574067B9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_76B70F975FE495F50B5D0B10574067B9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_FADA3B987BE2BA70AFB90B1057405049" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_76B70F975FE495F50B5D0B10574067B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_8B8636CFFD0FBB1B583E0B1057418750" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_A0698CA0E3246F3F82AE0B10573D37BA" xlink:to="loc_srt_RangeAxis_8B8636CFFD0FBB1B583E0B1057418750" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_84EB0E45C0FB9A216DF80B1057415D51_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_8B8636CFFD0FBB1B583E0B1057418750" xlink:to="loc_srt_RangeMember_84EB0E45C0FB9A216DF80B1057415D51_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_84EB0E45C0FB9A216DF80B1057415D51" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_8B8636CFFD0FBB1B583E0B1057418750" xlink:to="loc_srt_RangeMember_84EB0E45C0FB9A216DF80B1057415D51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate_63F2FCFF7EAF85B5EDF80B1057411FCD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_059CC9A03990AA395B190B105741E4D6" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate_63F2FCFF7EAF85B5EDF80B1057411FCD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AllowanceForBorrowedFundsUsedDuringConstruction" xlink:label="loc_evrg_AllowanceForBorrowedFundsUsedDuringConstruction_11B84D215C499471BE520B12B91EFD5E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_059CC9A03990AA395B190B105741E4D6" xlink:to="loc_evrg_AllowanceForBorrowedFundsUsedDuringConstruction_11B84D215C499471BE520B12B91EFD5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_28BBB62FBD9976E3BBDB0B11A710E3FE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_059CC9A03990AA395B190B105741E4D6" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_28BBB62FBD9976E3BBDB0B11A710E3FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions_1C72E886BB0131B6F3F00B1383F3E6D5" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_059CC9A03990AA395B190B105741E4D6" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions_1C72E886BB0131B6F3F00B1383F3E6D5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesCorporateOwnedLifeInsuranceDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesEarningsPerShareDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesFuelInventoryAndSuppliesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryLineItems" xlink:label="loc_us-gaap_InventoryLineItems_2C848BE67E7D9B73159308A06CFEF890" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryCurrentTable" xlink:label="loc_us-gaap_InventoryCurrentTable_7AC87B3B9385E5F0B53B08A06CFC7D8B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InventoryLineItems_2C848BE67E7D9B73159308A06CFEF890" xlink:to="loc_us-gaap_InventoryCurrentTable_7AC87B3B9385E5F0B53B08A06CFC7D8B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_55FE156197F0A0325E5608A06CFDFA17" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_7AC87B3B9385E5F0B53B08A06CFC7D8B" xlink:to="loc_dei_LegalEntityAxis_55FE156197F0A0325E5608A06CFDFA17" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_99017D87EE51051B20FC08A06CFD7920_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_55FE156197F0A0325E5608A06CFDFA17" xlink:to="loc_dei_EntityDomain_99017D87EE51051B20FC08A06CFD7920_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_99017D87EE51051B20FC08A06CFD7920" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_55FE156197F0A0325E5608A06CFDFA17" xlink:to="loc_dei_EntityDomain_99017D87EE51051B20FC08A06CFD7920" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_4C5C08E9FC0C01C89D4D08A06CFD5FA7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_99017D87EE51051B20FC08A06CFD7920" xlink:to="loc_evrg_KCPLMember_4C5C08E9FC0C01C89D4D08A06CFD5FA7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_AD624DED486F1563F13308A06CFE0CCD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_99017D87EE51051B20FC08A06CFD7920" xlink:to="loc_evrg_WestarEnergyIncMember_AD624DED486F1563F13308A06CFE0CCD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesInventoryAxis" xlink:label="loc_us-gaap_PublicUtilitiesInventoryAxis_4E8F864392A1C4444E8308A06CFE569F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_7AC87B3B9385E5F0B53B08A06CFC7D8B" xlink:to="loc_us-gaap_PublicUtilitiesInventoryAxis_4E8F864392A1C4444E8308A06CFE569F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_F923A180FC5D28C922E908A06CFE5FB6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_4E8F864392A1C4444E8308A06CFE569F" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_F923A180FC5D28C922E908A06CFE5FB6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_F923A180FC5D28C922E908A06CFE5FB6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_4E8F864392A1C4444E8308A06CFE569F" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_F923A180FC5D28C922E908A06CFE5FB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EnergyRelatedInventoryCoal" xlink:label="loc_us-gaap_EnergyRelatedInventoryCoal_BD4A7B9111FB8665718508A06CFEC968" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_2C848BE67E7D9B73159308A06CFEF890" xlink:to="loc_us-gaap_EnergyRelatedInventoryCoal_BD4A7B9111FB8665718508A06CFEC968" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_EnergyRelatedInventorySupplies" xlink:label="loc_evrg_EnergyRelatedInventorySupplies_E169D789E54AF075622A08A06CFF2ACD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_2C848BE67E7D9B73159308A06CFEF890" xlink:to="loc_evrg_EnergyRelatedInventorySupplies_E169D789E54AF075622A08A06CFF2ACD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EnergyRelatedInventory" xlink:label="loc_us-gaap_EnergyRelatedInventory_00C132AC5502BF22FF7D08A06CFF09D1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_2C848BE67E7D9B73159308A06CFEF890" xlink:to="loc_us-gaap_EnergyRelatedInventory_00C132AC5502BF22FF7D08A06CFF09D1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesNewAccountingStandardsDetails" xlink:type="extended">
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SummaryOfAccountingPoliciesLineItems" xlink:label="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:type="locator" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SummaryOfAccountingPoliciesTable" xlink:label="loc_evrg_SummaryOfAccountingPoliciesTable_D8E3571C545B16EB8C7507174AA96982" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:to="loc_evrg_SummaryOfAccountingPoliciesTable_D8E3571C545B16EB8C7507174AA96982" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_CD442E85376A0102599107174AA9A82E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D8E3571C545B16EB8C7507174AA96982" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_CD442E85376A0102599107174AA9A82E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_E880E28349BFA498B02807174AAAC3F7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_CD442E85376A0102599107174AA9A82E" xlink:to="loc_us-gaap_TypeOfAdoptionMember_E880E28349BFA498B02807174AAAC3F7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_E880E28349BFA498B02807174AAAC3F7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_CD442E85376A0102599107174AA9A82E" xlink:to="loc_us-gaap_TypeOfAdoptionMember_E880E28349BFA498B02807174AAAC3F7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsuranceSettlementsMember" xlink:label="loc_evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsuranceSettlementsMember_9DB2F96EA1E74EC6B5F007174AAA3F6C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_E880E28349BFA498B02807174AAAC3F7" xlink:to="loc_evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsuranceSettlementsMember_9DB2F96EA1E74EC6B5F007174AAA3F6C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsurancePremiumsMember" xlink:label="loc_evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsurancePremiumsMember_03624E0D49E306EAA59F07174AAA0F4F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_E880E28349BFA498B02807174AAAC3F7" xlink:to="loc_evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsurancePremiumsMember_03624E0D49E306EAA59F07174AAA0F4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201618Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201618Member_2C5CC2CF85B908D2933107174AAB6D70" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_E880E28349BFA498B02807174AAAC3F7" xlink:to="loc_us-gaap_AccountingStandardsUpdate201618Member_2C5CC2CF85B908D2933107174AAB6D70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_238F19A455A69AA363E907174AABD182" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_E880E28349BFA498B02807174AAAC3F7" xlink:to="loc_us-gaap_AccountingStandardsUpdate201602Member_238F19A455A69AA363E907174AABD182" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_E0A97324D4B2652E9F3F07174AABB8BE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D8E3571C545B16EB8C7507174AA96982" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_E0A97324D4B2652E9F3F07174AABB8BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_DA0CB7EAF1F6E9D46F3D07174AAB3B07_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_E0A97324D4B2652E9F3F07174AABB8BE" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_DA0CB7EAF1F6E9D46F3D07174AAB3B07_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_DA0CB7EAF1F6E9D46F3D07174AAB3B07" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_E0A97324D4B2652E9F3F07174AABB8BE" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_DA0CB7EAF1F6E9D46F3D07174AAB3B07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member" xlink:label="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_49A043D271D32AE5926807174AAB788F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_DA0CB7EAF1F6E9D46F3D07174AAB3B07" xlink:to="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_49A043D271D32AE5926807174AAB788F" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_1683F963406619D7290007174AAC616F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D8E3571C545B16EB8C7507174AA96982" xlink:to="loc_dei_LegalEntityAxis_1683F963406619D7290007174AAC616F" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_0D1246587192317986AC07174AACE975_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1683F963406619D7290007174AAC616F" xlink:to="loc_dei_EntityDomain_0D1246587192317986AC07174AACE975_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_0D1246587192317986AC07174AACE975" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1683F963406619D7290007174AAC616F" xlink:to="loc_dei_EntityDomain_0D1246587192317986AC07174AACE975" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_18D14729C9F391CCFD1707174AACB17B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_0D1246587192317986AC07174AACE975" xlink:to="loc_evrg_WestarEnergyIncMember_18D14729C9F391CCFD1707174AACB17B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_46A8888C98C25B8AD1D307174AAC42A8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_0D1246587192317986AC07174AACE975" xlink:to="loc_evrg_KCPLMember_46A8888C98C25B8AD1D307174AAC42A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_7EF9FB61DB89AF72CA0B07174AAC16D6" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D8E3571C545B16EB8C7507174AA96982" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_7EF9FB61DB89AF72CA0B07174AAC16D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_D23999DEEA4FB76DAF0E07174AADBA29_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_7EF9FB61DB89AF72CA0B07174AAC16D6" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_D23999DEEA4FB76DAF0E07174AADBA29_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_D23999DEEA4FB76DAF0E07174AADBA29" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_7EF9FB61DB89AF72CA0B07174AAC16D6" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_D23999DEEA4FB76DAF0E07174AADBA29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_92F0E47535E78E8A4B5A07174AADD859" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_D23999DEEA4FB76DAF0E07174AADBA29" xlink:to="loc_us-gaap_SubsequentEventMember_92F0E47535E78E8A4B5A07174AADD859" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9CFC8207EDB6F5AE504407174AADE518" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9CFC8207EDB6F5AE504407174AADE518" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_C282F10B3160308EC39007174AAE1FBD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_C282F10B3160308EC39007174AAE1FBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1E19D6E1862546D0681507174AAEBFEA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1E19D6E1862546D0681507174AAEBFEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes" xlink:label="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_52623128D66EE16E7E1907174AAED168" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:to="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_52623128D66EE16E7E1907174AAED168" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_A37BB9FCDD3889D94AF807174AAECC82" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:to="loc_us-gaap_Revenues_A37BB9FCDD3889D94AF807174AAECC82" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncreaseinAssetsfromASU201602" xlink:label="loc_evrg_IncreaseinAssetsfromASU201602_62B045B1D2078F81736007174AAEC283" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:to="loc_evrg_IncreaseinAssetsfromASU201602_62B045B1D2078F81736007174AAEC283" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification" xlink:label="loc_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_4E180D434CE39B70154507174AAE9B8B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_246C7CCA7208B71ADA1807174AAD7241" xlink:to="loc_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_4E180D434CE39B70154507174AAE9B8B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesOrganizationDetails" xlink:type="extended">
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SummaryOfAccountingPoliciesLineItems" xlink:label="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:type="locator" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_SummaryOfAccountingPoliciesTable" xlink:label="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_6AEF68080067E2C03FF908E973E94244" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_6AEF68080067E2C03FF908E973E94244" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_DD7A9C2A689EA955D03408E973E93B87_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_6AEF68080067E2C03FF908E973E94244" xlink:to="loc_us-gaap_TypeOfAdoptionMember_DD7A9C2A689EA955D03408E973E93B87_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_DD7A9C2A689EA955D03408E973E93B87" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_6AEF68080067E2C03FF908E973E94244" xlink:to="loc_us-gaap_TypeOfAdoptionMember_DD7A9C2A689EA955D03408E973E93B87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201707Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201707Member_60E0ABA034D1F793F81F08E973EF7D34" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_DD7A9C2A689EA955D03408E973E93B87" xlink:to="loc_us-gaap_AccountingStandardsUpdate201707Member_60E0ABA034D1F793F81F08E973EF7D34" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsuranceSettlementsMember" xlink:label="loc_evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsuranceSettlementsMember_7006B62CB0A57A63876C08E973EF7F34" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_DD7A9C2A689EA955D03408E973E93B87" xlink:to="loc_evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsuranceSettlementsMember_7006B62CB0A57A63876C08E973EF7F34" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsurancePremiumsMember" xlink:label="loc_evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsurancePremiumsMember_0B3B98355C0091DEE68008E973EFB49E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_DD7A9C2A689EA955D03408E973E93B87" xlink:to="loc_evrg_AccountingStandardsUpdate201615CorporateOwnedLifeInsurancePremiumsMember_0B3B98355C0091DEE68008E973EFB49E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201618Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201618Member_C298950B598A614FBD1108E973F03886" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_DD7A9C2A689EA955D03408E973E93B87" xlink:to="loc_us-gaap_AccountingStandardsUpdate201618Member_C298950B598A614FBD1108E973F03886" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_E0954570CCD8B96AA36908E973F06C38" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_E0954570CCD8B96AA36908E973F06C38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_FCF0FF113561CD39F36F08E973F01E6B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_E0954570CCD8B96AA36908E973F06C38" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_FCF0FF113561CD39F36F08E973F01E6B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_FCF0FF113561CD39F36F08E973F01E6B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_E0954570CCD8B96AA36908E973F06C38" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_FCF0FF113561CD39F36F08E973F01E6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_D1942E8C099F8711E4D808E973F0446C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_FCF0FF113561CD39F36F08E973F01E6B" xlink:to="loc_us-gaap_SubsequentEventMember_D1942E8C099F8711E4D808E973F0446C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_4D8B654B59311519DFE708E973F14F9E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_us-gaap_StatementClassOfStockAxis_4D8B654B59311519DFE708E973F14F9E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_9CACC854AAC2AED75C4D08E973F1EB0D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_4D8B654B59311519DFE708E973F14F9E" xlink:to="loc_us-gaap_ClassOfStockDomain_9CACC854AAC2AED75C4D08E973F1EB0D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_9CACC854AAC2AED75C4D08E973F1EB0D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_4D8B654B59311519DFE708E973F14F9E" xlink:to="loc_us-gaap_ClassOfStockDomain_9CACC854AAC2AED75C4D08E973F1EB0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_E4BD285C2E29A25E93EB08E973F1261B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9CACC854AAC2AED75C4D08E973F1EB0D" xlink:to="loc_us-gaap_CommonStockMember_E4BD285C2E29A25E93EB08E973F1261B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9C239845F2D257FECE7708E973F11F66" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9C239845F2D257FECE7708E973F11F66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5EC320C537CC62E95F3608E973F2EC2E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9C239845F2D257FECE7708E973F11F66" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5EC320C537CC62E95F3608E973F2EC2E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5EC320C537CC62E95F3608E973F2EC2E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_9C239845F2D257FECE7708E973F11F66" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5EC320C537CC62E95F3608E973F2EC2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember_23B0C5E90B115A5FFF4108E973F24470" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5EC320C537CC62E95F3608E973F2EC2E" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember_23B0C5E90B115A5FFF4108E973F24470" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_55743F983895CCA6888108E973F2BBB7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_us-gaap_StatementScenarioAxis_55743F983895CCA6888108E973F2BBB7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_4C38C93F9AD9A3387F8E08E973F2C374_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_55743F983895CCA6888108E973F2BBB7" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_4C38C93F9AD9A3387F8E08E973F2C374_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_4C38C93F9AD9A3387F8E08E973F2C374" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_55743F983895CCA6888108E973F2BBB7" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_4C38C93F9AD9A3387F8E08E973F2C374" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioAdjustmentMember" xlink:label="loc_us-gaap_ScenarioAdjustmentMember_5A882295F76F46A868FC08E973F3A460" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_4C38C93F9AD9A3387F8E08E973F2C374" xlink:to="loc_us-gaap_ScenarioAdjustmentMember_5A882295F76F46A868FC08E973F3A460" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_06F7A886F74B23F2F03908E973F39DCD" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_06F7A886F74B23F2F03908E973F39DCD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_B9B97201350D4E56348008E973F35BD7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_06F7A886F74B23F2F03908E973F39DCD" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_B9B97201350D4E56348008E973F35BD7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_B9B97201350D4E56348008E973F35BD7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_06F7A886F74B23F2F03908E973F39DCD" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_B9B97201350D4E56348008E973F35BD7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PrairieWindTransmissionLLCMember" xlink:label="loc_evrg_PrairieWindTransmissionLLCMember_17D824362322B0E65E3308E973F47FAD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_B9B97201350D4E56348008E973F35BD7" xlink:to="loc_evrg_PrairieWindTransmissionLLCMember_17D824362322B0E65E3308E973F47FAD" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TransourceEnergyLLCMember" xlink:label="loc_evrg_TransourceEnergyLLCMember_595587BA1592225642FB08E973F4CD33" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_B9B97201350D4E56348008E973F35BD7" xlink:to="loc_evrg_TransourceEnergyLLCMember_595587BA1592225642FB08E973F4CD33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_OwnershipAxis" xlink:label="loc_srt_OwnershipAxis_41B95096BBBE0C46B8B308E973F4444C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_srt_OwnershipAxis_41B95096BBBE0C46B8B308E973F4444C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_OwnershipDomain" xlink:label="loc_srt_OwnershipDomain_82B081C92BF166EB998A08E973F4EF68_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_41B95096BBBE0C46B8B308E973F4444C" xlink:to="loc_srt_OwnershipDomain_82B081C92BF166EB998A08E973F4EF68_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_OwnershipDomain" xlink:label="loc_srt_OwnershipDomain_82B081C92BF166EB998A08E973F4EF68" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_41B95096BBBE0C46B8B308E973F4444C" xlink:to="loc_srt_OwnershipDomain_82B081C92BF166EB998A08E973F4EF68" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasGasAndElectricCompanyMember" xlink:label="loc_evrg_KansasGasAndElectricCompanyMember_D82657288A7119242E0B08E973F5669D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_82B081C92BF166EB998A08E973F4EF68" xlink:to="loc_evrg_KansasGasAndElectricCompanyMember_D82657288A7119242E0B08E973F5669D" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_2271797AAE8ECB8AAF2708E973F594DE" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_dei_LegalEntityAxis_2271797AAE8ECB8AAF2708E973F594DE" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5156C5EB16E195224D1A08E973F5051C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2271797AAE8ECB8AAF2708E973F594DE" xlink:to="loc_dei_EntityDomain_5156C5EB16E195224D1A08E973F5051C_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5156C5EB16E195224D1A08E973F5051C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2271797AAE8ECB8AAF2708E973F594DE" xlink:to="loc_dei_EntityDomain_5156C5EB16E195224D1A08E973F5051C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AEPTransmissionHoldingCompanyLLCMember" xlink:label="loc_evrg_AEPTransmissionHoldingCompanyLLCMember_3C41999550C473895E0C08E973F67358" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5156C5EB16E195224D1A08E973F5051C" xlink:to="loc_evrg_AEPTransmissionHoldingCompanyLLCMember_3C41999550C473895E0C08E973F67358" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_3CDB71A8C00D778EF10B08E973F66019" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5156C5EB16E195224D1A08E973F5051C" xlink:to="loc_evrg_WestarEnergyIncMember_3CDB71A8C00D778EF10B08E973F66019" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_GPETransmissionHoldingCompanyLLCMember" xlink:label="loc_evrg_GPETransmissionHoldingCompanyLLCMember_3C57D1B42F9532920C5208E973F6B681" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5156C5EB16E195224D1A08E973F5051C" xlink:to="loc_evrg_GPETransmissionHoldingCompanyLLCMember_3C57D1B42F9532920C5208E973F6B681" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_326D1D78A81EFE1DC97B08E973F6B2BD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5156C5EB16E195224D1A08E973F5051C" xlink:to="loc_evrg_KCPLMember_326D1D78A81EFE1DC97B08E973F6B2BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementAxis" xlink:label="loc_srt_RestatementAxis_D4EF283C639B7A14E3CB08E973F7AEA3" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_evrg_SummaryOfAccountingPoliciesTable_D6E5465B0D31A8FAC33308E973E91E28" xlink:to="loc_srt_RestatementAxis_D4EF283C639B7A14E3CB08E973F7AEA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_1490C170D8832309826708E973F7D8E8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_D4EF283C639B7A14E3CB08E973F7AEA3" xlink:to="loc_srt_RestatementDomain_1490C170D8832309826708E973F7D8E8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_1490C170D8832309826708E973F7D8E8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_D4EF283C639B7A14E3CB08E973F7AEA3" xlink:to="loc_srt_RestatementDomain_1490C170D8832309826708E973F7D8E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScenarioPreviouslyReportedMember" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_F4B0A3E0E495A532DF8008E973F7836B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_1490C170D8832309826708E973F7D8E8" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_F4B0A3E0E495A532DF8008E973F7836B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementAdjustmentMember" xlink:label="loc_srt_RestatementAdjustmentMember_89AECD0235E24BD955DF08E973F7544F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_1490C170D8832309826708E973F7D8E8" xlink:to="loc_srt_RestatementAdjustmentMember_89AECD0235E24BD955DF08E973F7544F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_E7AB508497F569BB4F9408E973F8509F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_E7AB508497F569BB4F9408E973F8509F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NumberOfWhollyOwnedSubsidiaries" xlink:label="loc_evrg_NumberOfWhollyOwnedSubsidiaries_10BE36127DD0241E681008E973F8C470" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_evrg_NumberOfWhollyOwnedSubsidiaries_10BE36127DD0241E681008E973F8C470" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_57C484CB807D6822E68A08E973F88F0D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_57C484CB807D6822E68A08E973F88F0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_09FC3679CBE3B7BEA11E08E973F874F8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_09FC3679CBE3B7BEA11E08E973F874F8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_OwnedGeneratingCapacityAndRenewablePurchasedPower" xlink:label="loc_evrg_OwnedGeneratingCapacityAndRenewablePurchasedPower_29D790E1DF02D46D374C08E973F90F1C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_evrg_OwnedGeneratingCapacityAndRenewablePurchasedPower_29D790E1DF02D46D374C08E973F90F1C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NumberOfCustomersServed" xlink:label="loc_evrg_NumberOfCustomersServed_C0A62220136F01CB080A08E973F9B8B1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_evrg_NumberOfCustomersServed_C0A62220136F01CB080A08E973F9B8B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_4DBC400052AE13D8E64408E973F9A323" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_4DBC400052AE13D8E64408E973F9A323" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_6109A3DF4FFA0129A9D808E973F99C83" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_6109A3DF4FFA0129A9D808E973F99C83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_0EF0F06F1883AF06639908E973F99328" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_SummaryOfAccountingPoliciesLineItems_9058B631177594D2EAFD08E973F8300D" xlink:to="loc_us-gaap_Goodwill_0EF0F06F1883AF06639908E973F99328" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesOtherIncomeExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_C17C2D507FB38C6674C508A06CC09B52" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_B04AB2C8AE19E4343F0408A06CBF0D08" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_C17C2D507FB38C6674C508A06CC09B52" xlink:to="loc_us-gaap_StatementTable_B04AB2C8AE19E4343F0408A06CBF0D08" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_F4221AE17499F6F305DB08A06CBF6BE3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_B04AB2C8AE19E4343F0408A06CBF0D08" xlink:to="loc_dei_LegalEntityAxis_F4221AE17499F6F305DB08A06CBF6BE3" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E4695F47DCCF209A80E308A06CBF58CA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_F4221AE17499F6F305DB08A06CBF6BE3" xlink:to="loc_dei_EntityDomain_E4695F47DCCF209A80E308A06CBF58CA_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_E4695F47DCCF209A80E308A06CBF58CA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_F4221AE17499F6F305DB08A06CBF6BE3" xlink:to="loc_dei_EntityDomain_E4695F47DCCF209A80E308A06CBF58CA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_1642A4E68A562F450DE908A06CC05AD7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E4695F47DCCF209A80E308A06CBF58CA" xlink:to="loc_evrg_WestarEnergyIncMember_1642A4E68A562F450DE908A06CC05AD7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_2136C1E03AED76F9653C08A06CC04E1B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_E4695F47DCCF209A80E308A06CBF58CA" xlink:to="loc_evrg_KCPLMember_2136C1E03AED76F9653C08A06CC04E1B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NonServiceCostComponentOfNetBenefitCost" xlink:label="loc_evrg_NonServiceCostComponentOfNetBenefitCost_322E782518996F0B382108A06CC04F6B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C17C2D507FB38C6674C508A06CC09B52" xlink:to="loc_evrg_NonServiceCostComponentOfNetBenefitCost_322E782518996F0B382108A06CC04F6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherExpenses" xlink:label="loc_us-gaap_OtherExpenses_C61EF9DC7068C99D9A4F08A06CC0F209" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C17C2D507FB38C6674C508A06CC09B52" xlink:to="loc_us-gaap_OtherExpenses_C61EF9DC7068C99D9A4F08A06CC0F209" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="loc_us-gaap_OtherNonoperatingExpense_7F8967EFA3111300AD6C08A06CC15A6D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_C17C2D507FB38C6674C508A06CC09B52" xlink:to="loc_us-gaap_OtherNonoperatingExpense_7F8967EFA3111300AD6C08A06CC15A6D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5CFDDCACDBAAA2A3548105F82F176A44" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_D7DE16CE93AE6D1DF7F405F82F146A34" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5CFDDCACDBAAA2A3548105F82F176A44" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_D7DE16CE93AE6D1DF7F405F82F146A34" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetAxis" xlink:label="loc_us-gaap_RegulatoryAssetAxis_92697AA330C696AF6C130612BD26198D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_D7DE16CE93AE6D1DF7F405F82F146A34" xlink:to="loc_us-gaap_RegulatoryAssetAxis_92697AA330C696AF6C130612BD26198D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="loc_us-gaap_RegulatoryAssetDomain_0B5CC7727F35103336BD0612BD29DE23_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAssetAxis_92697AA330C696AF6C130612BD26198D" xlink:to="loc_us-gaap_RegulatoryAssetDomain_0B5CC7727F35103336BD0612BD29DE23_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="loc_us-gaap_RegulatoryAssetDomain_0B5CC7727F35103336BD0612BD29DE23" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAssetAxis_92697AA330C696AF6C130612BD26198D" xlink:to="loc_us-gaap_RegulatoryAssetDomain_0B5CC7727F35103336BD0612BD29DE23" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_RetiredGenerationFacilityMember" xlink:label="loc_evrg_RetiredGenerationFacilityMember_CA2BC7722BE13581800E0612BD7DB846" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_0B5CC7727F35103336BD0612BD29DE23" xlink:to="loc_evrg_RetiredGenerationFacilityMember_CA2BC7722BE13581800E0612BD7DB846" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_17227EFFD056B3CA3DFC05F82F1453E3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_D7DE16CE93AE6D1DF7F405F82F146A34" xlink:to="loc_dei_LegalEntityAxis_17227EFFD056B3CA3DFC05F82F1453E3" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F3E8015F550020A1101005F82F143DAF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_17227EFFD056B3CA3DFC05F82F1453E3" xlink:to="loc_dei_EntityDomain_F3E8015F550020A1101005F82F143DAF_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_F3E8015F550020A1101005F82F143DAF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_17227EFFD056B3CA3DFC05F82F1453E3" xlink:to="loc_dei_EntityDomain_F3E8015F550020A1101005F82F143DAF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_9660123DA25011B1163005F82F14584E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F3E8015F550020A1101005F82F143DAF" xlink:to="loc_evrg_WestarEnergyIncMember_9660123DA25011B1163005F82F14584E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_683B7FF353B16CD49AE205F82F15693F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F3E8015F550020A1101005F82F143DAF" xlink:to="loc_evrg_KCPLMember_683B7FF353B16CD49AE205F82F15693F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KcplGreaterMissouriOperationsMember" xlink:label="loc_evrg_KcplGreaterMissouriOperationsMember_DCD5EDAED126E4D73AA605F82F15F808" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_F3E8015F550020A1101005F82F143DAF" xlink:to="loc_evrg_KcplGreaterMissouriOperationsMember_DCD5EDAED126E4D73AA605F82F15F808" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_00B25DF61A7F3FACCB2605F82F157AF2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_D7DE16CE93AE6D1DF7F405F82F146A34" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_00B25DF61A7F3FACCB2605F82F157AF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_BDDDC795A7989973F86005F82F16796D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_00B25DF61A7F3FACCB2605F82F157AF2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_BDDDC795A7989973F86005F82F16796D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_BDDDC795A7989973F86005F82F16796D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_00B25DF61A7F3FACCB2605F82F157AF2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_BDDDC795A7989973F86005F82F16796D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_98AB53ECA087498B15C705F82F1602DA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_D7DE16CE93AE6D1DF7F405F82F146A34" xlink:to="loc_srt_RangeAxis_98AB53ECA087498B15C705F82F1602DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_D9CCBEAC9FEEB87405BD05F82F16C262_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_98AB53ECA087498B15C705F82F1602DA" xlink:to="loc_srt_RangeMember_D9CCBEAC9FEEB87405BD05F82F16C262_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_D9CCBEAC9FEEB87405BD05F82F16C262" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_98AB53ECA087498B15C705F82F1602DA" xlink:to="loc_srt_RangeMember_D9CCBEAC9FEEB87405BD05F82F16C262" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_2C95FED62E9264A042C505F82F162D70" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_D9CCBEAC9FEEB87405BD05F82F16C262" xlink:to="loc_srt_MinimumMember_2C95FED62E9264A042C505F82F162D70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_F2140C729EED9B43376705F82F163ACF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_D9CCBEAC9FEEB87405BD05F82F16C262" xlink:to="loc_srt_MaximumMember_F2140C729EED9B43376705F82F163ACF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryAssets" xlink:label="loc_us-gaap_RegulatoryAssets_0E21A6F88756B8257EBE0612BCEC7728" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5CFDDCACDBAAA2A3548105F82F176A44" xlink:to="loc_us-gaap_RegulatoryAssets_0E21A6F88756B8257EBE0612BCEC7728" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService_2FAF9D75717CE7EC065F05F82F174AF4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5CFDDCACDBAAA2A3548105F82F176A44" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService_2FAF9D75717CE7EC065F05F82F174AF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentGenerationUsefulLife" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentGenerationUsefulLife_266BA13B7B1ACF9639B305F82F18797A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5CFDDCACDBAAA2A3548105F82F176A44" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentGenerationUsefulLife_266BA13B7B1ACF9639B305F82F18797A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionUsefulLife" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionUsefulLife_721A01F764B7EBC1B35405F82F18A46D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5CFDDCACDBAAA2A3548105F82F176A44" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionUsefulLife_721A01F764B7EBC1B35405F82F18A46D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDistributionUsefulLife" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDistributionUsefulLife_F1E0BE078D3676F1B54205F82F18E88B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5CFDDCACDBAAA2A3548105F82F176A44" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDistributionUsefulLife_F1E0BE078D3676F1B54205F82F18E88B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipmentUsefulLife_CF20BB30DF580FA2439405F82F18BF61" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5CFDDCACDBAAA2A3548105F82F176A44" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipmentUsefulLife_CF20BB30DF580FA2439405F82F18BF61" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfRetrospectiveAdjustmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_7A1D06C85602A9EBED7B08E9733B41DC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable" xlink:label="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_4A840F8A98EC571778A008E973322B7F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_7A1D06C85602A9EBED7B08E9733B41DC" xlink:to="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_4A840F8A98EC571778A008E973322B7F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_13158D3C50894AF5BA3308E97332CC25" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_4A840F8A98EC571778A008E973322B7F" xlink:to="loc_dei_LegalEntityAxis_13158D3C50894AF5BA3308E97332CC25" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_CE11B4452C3E4B92E62508E97333B9E6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_13158D3C50894AF5BA3308E97332CC25" xlink:to="loc_dei_EntityDomain_CE11B4452C3E4B92E62508E97333B9E6_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_CE11B4452C3E4B92E62508E97333B9E6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_13158D3C50894AF5BA3308E97332CC25" xlink:to="loc_dei_EntityDomain_CE11B4452C3E4B92E62508E97333B9E6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_E9CFD8C437B7D4A6220C08E973331098" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_CE11B4452C3E4B92E62508E97333B9E6" xlink:to="loc_evrg_WestarEnergyIncMember_E9CFD8C437B7D4A6220C08E973331098" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_096126E047AEC976378108E97333829D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_CE11B4452C3E4B92E62508E97333B9E6" xlink:to="loc_evrg_KCPLMember_096126E047AEC976378108E97333829D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B7973F103ED30DD85A1A08E97333CB90" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_4A840F8A98EC571778A008E973322B7F" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B7973F103ED30DD85A1A08E97333CB90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_A26BFC54D73F339B036608E973343874_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B7973F103ED30DD85A1A08E97333CB90" xlink:to="loc_us-gaap_TypeOfAdoptionMember_A26BFC54D73F339B036608E973343874_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_A26BFC54D73F339B036608E973343874" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_B7973F103ED30DD85A1A08E97333CB90" xlink:to="loc_us-gaap_TypeOfAdoptionMember_A26BFC54D73F339B036608E973343874" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201707Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201707Member_1C99F086BE553ECB8F3D08E973346494" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_A26BFC54D73F339B036608E973343874" xlink:to="loc_us-gaap_AccountingStandardsUpdate201707Member_1C99F086BE553ECB8F3D08E973346494" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_C25770800471397528A408E973392306" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_4A840F8A98EC571778A008E973322B7F" xlink:to="loc_us-gaap_StatementScenarioAxis_C25770800471397528A408E973392306" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_AEE6039EC33206BF2CB908E973392526_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_C25770800471397528A408E973392306" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_AEE6039EC33206BF2CB908E973392526_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_AEE6039EC33206BF2CB908E973392526" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_C25770800471397528A408E973392306" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_AEE6039EC33206BF2CB908E973392526" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioAdjustmentMember" xlink:label="loc_us-gaap_ScenarioAdjustmentMember_60D759E26F070A6D16C608E9733A630A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_AEE6039EC33206BF2CB908E973392526" xlink:to="loc_us-gaap_ScenarioAdjustmentMember_60D759E26F070A6D16C608E9733A630A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis_4184B5DE7B7958DB819908E9733AFCFD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_4A840F8A98EC571778A008E973322B7F" xlink:to="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis_4184B5DE7B7958DB819908E9733AFCFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForErrorCorrectionDomain" xlink:label="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_85F76660603F4309233408E9733A5B9A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis_4184B5DE7B7958DB819908E9733AFCFD" xlink:to="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_85F76660603F4309233408E9733A5B9A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForErrorCorrectionDomain" xlink:label="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_85F76660603F4309233408E9733A5B9A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis_4184B5DE7B7958DB819908E9733AFCFD" xlink:to="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_85F76660603F4309233408E9733A5B9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementAxis" xlink:label="loc_srt_RestatementAxis_BA387F8262817CB49CC508E9733AAD85" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_4A840F8A98EC571778A008E973322B7F" xlink:to="loc_srt_RestatementAxis_BA387F8262817CB49CC508E9733AAD85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_59BD4822FF3CB26B626C08E9733B0399_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_BA387F8262817CB49CC508E9733AAD85" xlink:to="loc_srt_RestatementDomain_59BD4822FF3CB26B626C08E9733B0399_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_59BD4822FF3CB26B626C08E9733B0399" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_BA387F8262817CB49CC508E9733AAD85" xlink:to="loc_srt_RestatementDomain_59BD4822FF3CB26B626C08E9733B0399" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScenarioPreviouslyReportedMember" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_E716EBE83DFA9DCD352108E9733BDFA6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_59BD4822FF3CB26B626C08E9733B0399" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_E716EBE83DFA9DCD352108E9733BDFA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementAdjustmentMember" xlink:label="loc_srt_RestatementAdjustmentMember_A7FF59ECBE01027A05D608E9733BADBC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_59BD4822FF3CB26B626C08E9733B0399" xlink:to="loc_srt_RestatementAdjustmentMember_A7FF59ECBE01027A05D608E9733BADBC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_4980C482CC69F8DD668308E9733B625E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_7A1D06C85602A9EBED7B08E9733B41DC" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_4980C482CC69F8DD668308E9733B625E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_4E3E5EE989575C494AAD08E9733C70A4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_7A1D06C85602A9EBED7B08E9733B41DC" xlink:to="loc_us-gaap_CostsAndExpenses_4E3E5EE989575C494AAD08E9733C70A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_A22872AA142EFBCBA1DF08E9733C427E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_7A1D06C85602A9EBED7B08E9733B41DC" xlink:to="loc_us-gaap_OperatingIncomeLoss_A22872AA142EFBCBA1DF08E9733C427E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="loc_us-gaap_OtherNonoperatingExpense_4BD85B43B6AE561E2A7408E9733CFEC7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_7A1D06C85602A9EBED7B08E9733B41DC" xlink:to="loc_us-gaap_OtherNonoperatingExpense_4BD85B43B6AE561E2A7408E9733CFEC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_3C9069FE6854E8A622EF08E9733C2992" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_7A1D06C85602A9EBED7B08E9733B41DC" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_3C9069FE6854E8A622EF08E9733C2992" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfReclassificationsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable" xlink:label="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_28DD2886EC0E1CAABED808E973C496BA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_28DD2886EC0E1CAABED808E973C496BA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_CF36FFA9AF2E800B925308E973C4E545" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_28DD2886EC0E1CAABED808E973C496BA" xlink:to="loc_dei_LegalEntityAxis_CF36FFA9AF2E800B925308E973C4E545" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_3FA9754E25E9FEAC8AA408E973C44F07_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_CF36FFA9AF2E800B925308E973C4E545" xlink:to="loc_dei_EntityDomain_3FA9754E25E9FEAC8AA408E973C44F07_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_3FA9754E25E9FEAC8AA408E973C44F07" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_CF36FFA9AF2E800B925308E973C4E545" xlink:to="loc_dei_EntityDomain_3FA9754E25E9FEAC8AA408E973C44F07" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_846E407DB19EB6FDD53D08E973C5B21D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3FA9754E25E9FEAC8AA408E973C44F07" xlink:to="loc_evrg_WestarEnergyIncMember_846E407DB19EB6FDD53D08E973C5B21D" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_E1A9AE6559E40CE8BBDA08E973C56DA0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3FA9754E25E9FEAC8AA408E973C44F07" xlink:to="loc_evrg_KCPLMember_E1A9AE6559E40CE8BBDA08E973C56DA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementAxis" xlink:label="loc_srt_RestatementAxis_BDB65C85F3D4ABF4D53708E973C571E2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_28DD2886EC0E1CAABED808E973C496BA" xlink:to="loc_srt_RestatementAxis_BDB65C85F3D4ABF4D53708E973C571E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_8C2684EE64DAD68376A808E973C5BED9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_BDB65C85F3D4ABF4D53708E973C571E2" xlink:to="loc_srt_RestatementDomain_8C2684EE64DAD68376A808E973C5BED9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_8C2684EE64DAD68376A808E973C5BED9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_BDB65C85F3D4ABF4D53708E973C571E2" xlink:to="loc_srt_RestatementDomain_8C2684EE64DAD68376A808E973C5BED9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScenarioPreviouslyReportedMember" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_19C83C9AB18E8BA4534508E973C559A2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_8C2684EE64DAD68376A808E973C5BED9" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_19C83C9AB18E8BA4534508E973C559A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementAdjustmentMember" xlink:label="loc_srt_RestatementAdjustmentMember_B5842564A297859C3B7508E973C654AA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_8C2684EE64DAD68376A808E973C5BED9" xlink:to="loc_srt_RestatementAdjustmentMember_B5842564A297859C3B7508E973C654AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAmortizationOfDeferredCharges" xlink:label="loc_us-gaap_OtherAmortizationOfDeferredCharges_541719FDE214B67014FE08E973C6753A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_OtherAmortizationOfDeferredCharges_541719FDE214B67014FE08E973C6753A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmortizationOfDeferredRefuelingOutageCosts" xlink:label="loc_evrg_AmortizationOfDeferredRefuelingOutageCosts_A5CC671630EB5BF50E0508E973C6D394" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_evrg_AmortizationOfDeferredRefuelingOutageCosts_A5CC671630EB5BF50E0508E973C6D394" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_36B3F2EF10CD90D57BCB08E973C74E70" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_36B3F2EF10CD90D57BCB08E973C74E70" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_InvestmentTaxCreditAmortization" xlink:label="loc_evrg_InvestmentTaxCreditAmortization_06B10994BA7A381A330508E973C710A0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_evrg_InvestmentTaxCreditAmortization_06B10994BA7A381A330508E973C710A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_FEE25FDB31570779244808E973CCBEC1" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_FEE25FDB31570779244808E973CCBEC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetRetirementObligationCashPaidToSettle" xlink:label="loc_us-gaap_AssetRetirementObligationCashPaidToSettle_EC09D74FCD2FD33C9FB408E973CCD09D" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_AssetRetirementObligationCashPaidToSettle_EC09D74FCD2FD33C9FB408E973CCD09D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_0C274C173B0EADAAB8F008E973CCECDE" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_0C274C173B0EADAAB8F008E973CCECDE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncreaseDecreaseInEnergyRelatedInventory" xlink:label="loc_evrg_IncreaseDecreaseInEnergyRelatedInventory_931C30816D5B01C4372C08E973CD3C02" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_evrg_IncreaseDecreaseInEnergyRelatedInventory_931C30816D5B01C4372C08E973CD3C02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInFuelInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInFuelInventories_8D7E849A33649B1CA97308E973CD5164" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInFuelInventories_8D7E849A33649B1CA97308E973CD5164" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories_31AA08DFD23FACB2182B08E973CDCEA9" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInRawMaterialsPackagingMaterialsAndSuppliesInventories_31AA08DFD23FACB2182B08E973CDCEA9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_6E3B215AB52141D5B0A608E973CDAC58" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_6E3B215AB52141D5B0A608E973CDAC58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_25A26F1FFC527519316E08E973CD0B7B" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_25A26F1FFC527519316E08E973CD0B7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_1FC58B5113BD2556604508E973CE5DBC" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_1FC58B5113BD2556604508E973CE5DBC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_D35A3346D68C88108ED508E973CEBC8A" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_D35A3346D68C88108ED508E973CEBC8A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_05859656892BC1F5A72108E973CE9A24" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_05859656892BC1F5A72108E973CE9A24" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncreaseDecreaseInDeferredRefuelingOutageCosts" xlink:label="loc_evrg_IncreaseDecreaseInDeferredRefuelingOutageCosts_6DE8FC355CAAF8886B6908E973CEC209" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_evrg_IncreaseDecreaseInDeferredRefuelingOutageCosts_6DE8FC355CAAF8886B6908E973CEC209" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" xlink:label="loc_us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations_41B2B47D96288AA7DD3008E973CE2882" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations_41B2B47D96288AA7DD3008E973CE2882" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOverUnderEnergyRecovery" xlink:label="loc_us-gaap_IncreaseDecreaseInOverUnderEnergyRecovery_325D767893D119047BE608E973CE5A2D" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_IncreaseDecreaseInOverUnderEnergyRecovery_325D767893D119047BE608E973CE5A2D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_EC19F753A62CECAD671708E973CF5D33" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_EC19F753A62CECAD671708E973CF5D33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_31DEB16530954C1180D508E973CF0779" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_31DEB16530954C1180D508E973CF0779" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_PaymentstoAcquirePropertyPlantandEquipmentUtility" xlink:label="loc_evrg_PaymentstoAcquirePropertyPlantandEquipmentUtility_5764F1ED172808C5931608E973CF7B67" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_evrg_PaymentstoAcquirePropertyPlantandEquipmentUtility_5764F1ED172808C5931608E973CF7B67" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AllowanceForBorrowedFundsUsedDuringConstruction" xlink:label="loc_evrg_AllowanceForBorrowedFundsUsedDuringConstruction_60A98F6E9670F8B8B01E08E973CFCD40" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_evrg_AllowanceForBorrowedFundsUsedDuringConstruction_60A98F6E9670F8B8B01E08E973CFCD40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_9403480FB326E4E81C8F08E973CF4683" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_9403480FB326E4E81C8F08E973CF4683" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_8B9D77FA7027B755A3CC08E973D04B47" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_870564D57C6709846EB908E973C6963A" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_8B9D77FA7027B755A3CC08E973D04B47" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/SummaryOfSignificantAccountingPoliciesSupplementalCashFlowInformationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_37EEFD90BBB57A4D75C608A06D0C37F8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_B0F3C88200BEFF2CD0B608A06D0A73D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_37EEFD90BBB57A4D75C608A06D0C37F8" xlink:to="loc_us-gaap_StatementTable_B0F3C88200BEFF2CD0B608A06D0A73D2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_80C110868FB5F2D08D8E08A06D0A79D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_B0F3C88200BEFF2CD0B608A06D0A73D2" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_80C110868FB5F2D08D8E08A06D0A79D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_DBAA0EEC599B94FC3D9608A06D0AA26D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_80C110868FB5F2D08D8E08A06D0A79D4" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_DBAA0EEC599B94FC3D9608A06D0AA26D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_DBAA0EEC599B94FC3D9608A06D0AA26D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_80C110868FB5F2D08D8E08A06D0A79D4" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_DBAA0EEC599B94FC3D9608A06D0AA26D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember_65BB414A0B4BF3863E4808A06D0BC4D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_DBAA0EEC599B94FC3D9608A06D0AA26D" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryAggregatedDisclosureMember_65BB414A0B4BF3863E4808A06D0BC4D4" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_548BB0C4339DB6EF4A6808A06D0BA763" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_B0F3C88200BEFF2CD0B608A06D0A73D2" xlink:to="loc_dei_LegalEntityAxis_548BB0C4339DB6EF4A6808A06D0BA763" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_4F63F8EA080EBFC906F808A06D0B8568_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_548BB0C4339DB6EF4A6808A06D0BA763" xlink:to="loc_dei_EntityDomain_4F63F8EA080EBFC906F808A06D0B8568_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_4F63F8EA080EBFC906F808A06D0B8568" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_548BB0C4339DB6EF4A6808A06D0BA763" xlink:to="loc_dei_EntityDomain_4F63F8EA080EBFC906F808A06D0B8568" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_6975A727BF148ED0C17608A06D0C1E30" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4F63F8EA080EBFC906F808A06D0B8568" xlink:to="loc_evrg_KCPLMember_6975A727BF148ED0C17608A06D0C1E30" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_55E0C73DC98BCB988F5808A06D0C21E2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4F63F8EA080EBFC906F808A06D0B8568" xlink:to="loc_evrg_WestarEnergyIncMember_55E0C73DC98BCB988F5808A06D0C21E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplementalCashFlowElementsAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowElementsAbstract_69DD400440073EC45CAA08A06D0C19AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_37EEFD90BBB57A4D75C608A06D0C37F8" xlink:to="loc_us-gaap_SupplementalCashFlowElementsAbstract_69DD400440073EC45CAA08A06D0C19AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestPaid" xlink:label="loc_us-gaap_InterestPaid_420835AD05483D5476AC08A06D0DD5C5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowElementsAbstract_69DD400440073EC45CAA08A06D0C19AF" xlink:to="loc_us-gaap_InterestPaid_420835AD05483D5476AC08A06D0DD5C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_9DF389B6E7705CAFBB0408A06D0DCF5B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowElementsAbstract_69DD400440073EC45CAA08A06D0C19AF" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_9DF389B6E7705CAFBB0408A06D0DCF5B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_7A675D0B7945A09207D608A06D0D90BA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowElementsAbstract_69DD400440073EC45CAA08A06D0C19AF" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_7A675D0B7945A09207D608A06D0D90BA" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NonCashPropertyPlantAndEquipmentAdditionsReductions" xlink:label="loc_evrg_NonCashPropertyPlantAndEquipmentAdditionsReductions_EA68F602A0504D2F05D408A06D0DF49B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_7A675D0B7945A09207D608A06D0D90BA" xlink:to="loc_evrg_NonCashPropertyPlantAndEquipmentAdditionsReductions_EA68F602A0504D2F05D408A06D0DF49B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DeconsolidationOfPropertyPlantAndEquipmentOfVIE" xlink:label="loc_evrg_DeconsolidationOfPropertyPlantAndEquipmentOfVIE_4774630F0C7DF256348E08A06D0D76B7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_7A675D0B7945A09207D608A06D0D90BA" xlink:to="loc_evrg_DeconsolidationOfPropertyPlantAndEquipmentOfVIE_4774630F0C7DF256348E08A06D0D76B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNoncashInvestingAndFinancingItemsAbstract" xlink:label="loc_us-gaap_OtherNoncashInvestingAndFinancingItemsAbstract_D5A28DAEEDAF0270E59908A06D0EBE4F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowElementsAbstract_69DD400440073EC45CAA08A06D0C19AF" xlink:to="loc_us-gaap_OtherNoncashInvestingAndFinancingItemsAbstract_D5A28DAEEDAF0270E59908A06D0EBE4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssued1" xlink:label="loc_us-gaap_StockIssued1_D13B247823A51A5A769908A06D0E5CC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNoncashInvestingAndFinancingItemsAbstract_D5A28DAEEDAF0270E59908A06D0EBE4F" xlink:to="loc_us-gaap_StockIssued1_D13B247823A51A5A769908A06D0E5CC2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NonCashFinancingDeconsolidationOfVIE" xlink:label="loc_evrg_NonCashFinancingDeconsolidationOfVIE_CAE8E752E41ADC2FEF2308A06D0E4168" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNoncashInvestingAndFinancingItemsAbstract_D5A28DAEEDAF0270E59908A06D0EBE4F" xlink:to="loc_evrg_NonCashFinancingDeconsolidationOfVIE_CAE8E752E41ADC2FEF2308A06D0E4168" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeaseObligationsIncurred" xlink:label="loc_us-gaap_CapitalLeaseObligationsIncurred_4BAE175ABA2E6B0032F208A06D0EFF2A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNoncashInvestingAndFinancingItemsAbstract_D5A28DAEEDAF0270E59908A06D0EBE4F" xlink:to="loc_us-gaap_CapitalLeaseObligationsIncurred_4BAE175ABA2E6B0032F208A06D0EFF2A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/Taxes" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/TaxesDeferredIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_37E33588988A29EDE10B08E1E68EB6CB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_6A2D5662699B714AE70608E1E68CADBF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_37E33588988A29EDE10B08E1E68EB6CB" xlink:to="loc_us-gaap_StatementTable_6A2D5662699B714AE70608E1E68CADBF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_4EDF5E84CD40ED3535AA08E1E68D02D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6A2D5662699B714AE70608E1E68CADBF" xlink:to="loc_dei_LegalEntityAxis_4EDF5E84CD40ED3535AA08E1E68D02D3" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_7895C0EEEED1B7C9EFA708E1E68D5B37_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_4EDF5E84CD40ED3535AA08E1E68D02D3" xlink:to="loc_dei_EntityDomain_7895C0EEEED1B7C9EFA708E1E68D5B37_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_7895C0EEEED1B7C9EFA708E1E68D5B37" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_4EDF5E84CD40ED3535AA08E1E68D02D3" xlink:to="loc_dei_EntityDomain_7895C0EEEED1B7C9EFA708E1E68D5B37" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_507B801C01635526B7BA08E1E68DC84F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7895C0EEEED1B7C9EFA708E1E68D5B37" xlink:to="loc_evrg_WestarEnergyIncMember_507B801C01635526B7BA08E1E68DC84F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_077853B09C3AEA2E3E1808E1E68E8111" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7895C0EEEED1B7C9EFA708E1E68D5B37" xlink:to="loc_evrg_KCPLMember_077853B09C3AEA2E3E1808E1E68E8111" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_8898790444E115138F6D08E1E68E8C43" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6A2D5662699B714AE70608E1E68CADBF" xlink:to="loc_srt_ConsolidatedEntitiesAxis_8898790444E115138F6D08E1E68E8C43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_89D1A89BE515BEFF776E08E1E68E5047_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8898790444E115138F6D08E1E68E8C43" xlink:to="loc_srt_ConsolidatedEntitiesDomain_89D1A89BE515BEFF776E08E1E68E5047_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_89D1A89BE515BEFF776E08E1E68E5047" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8898790444E115138F6D08E1E68E8C43" xlink:to="loc_srt_ConsolidatedEntitiesDomain_89D1A89BE515BEFF776E08E1E68E5047" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract" xlink:label="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_70AE27E78891C05EF16008E1E68EA815" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_37E33588988A29EDE10B08E1E68EB6CB" xlink:to="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_70AE27E78891C05EF16008E1E68EA815" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsGrossAbstract" xlink:label="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_70AE27E78891C05EF16008E1E68EA815" xlink:to="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness_34B6225B67EB1107657808E1E68F0EA8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness_34B6225B67EB1107657808E1E68F0EA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsRegulatoryAssetsAndLiabilities" xlink:label="loc_us-gaap_DeferredTaxAssetsRegulatoryAssetsAndLiabilities_8DBDAAD2C8E69B0C1B0608E1E68FB479" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsRegulatoryAssetsAndLiabilities_8DBDAAD2C8E69B0C1B0608E1E68FB479" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation_CDFD046DD5D3E7704D6B08E1E68FAF10" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation_CDFD046DD5D3E7704D6B08E1E68FAF10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_63E37D38885B16FE113208E1E68FC727" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_63E37D38885B16FE113208E1E68FC727" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsStateTaxes" xlink:label="loc_us-gaap_DeferredTaxAssetsStateTaxes_4F3FDBEF26FB0F19499908E1E690F338" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsStateTaxes_4F3FDBEF26FB0F19499908E1E690F338" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax_1CF70FF514E5B4062F0208E1E690C71A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax_1CF70FF514E5B4062F0208E1E690C71A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_407A6F28EB67A1AD19EF08E1E690CD80" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_407A6F28EB67A1AD19EF08E1E690CD80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_AFCDD9ADA34DD31F4CE808E1E690EAA8" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_AFCDD9ADA34DD31F4CE808E1E690EAA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_A8BD759E8FFE697EBBC308E1E69053DD" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_A8BD759E8FFE697EBBC308E1E69053DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_355FFA96A44FE487878208E1E6903BD3" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_355FFA96A44FE487878208E1E6903BD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_596AF6C0D982AA63193708E1E6910B94" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_6612ACA68C9D15A45B1B08E1E68FCC11" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_596AF6C0D982AA63193708E1E6910B94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesAbstract" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesAbstract_5537B57B94E48E11CCFF08E1E691EFAB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_70AE27E78891C05EF16008E1E68EA815" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesAbstract_5537B57B94E48E11CCFF08E1E691EFAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_E3140B7993F5DBE1782408E1E691B607" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_5537B57B94E48E11CCFF08E1E691EFAB" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_E3140B7993F5DBE1782408E1E691B607" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DeferredTaxLiabilitiesEmployeeBenefitCosts" xlink:label="loc_evrg_DeferredTaxLiabilitiesEmployeeBenefitCosts_87A6F843B046F0B9242108E1E69124F0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_5537B57B94E48E11CCFF08E1E691EFAB" xlink:to="loc_evrg_DeferredTaxLiabilitiesEmployeeBenefitCosts_87A6F843B046F0B9242108E1E69124F0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_DeferredTaxLiabilitiesAcquisitionPremium" xlink:label="loc_evrg_DeferredTaxLiabilitiesAcquisitionPremium_ED1702BA9D89033A2A4408E1E6918049" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_5537B57B94E48E11CCFF08E1E691EFAB" xlink:to="loc_evrg_DeferredTaxLiabilitiesAcquisitionPremium_ED1702BA9D89033A2A4408E1E6918049" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_E9C6CA3D87E47401329308E1E692482F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_5537B57B94E48E11CCFF08E1E691EFAB" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_E9C6CA3D87E47401329308E1E692482F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_EBD72D4D05A3C53D384C08E1E6924E82" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_5537B57B94E48E11CCFF08E1E691EFAB" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_EBD72D4D05A3C53D384C08E1E6924E82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_243FCFDBBAAD09345E9C08E1E692A117" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_70AE27E78891C05EF16008E1E68EA815" xlink:to="loc_us-gaap_DeferredTaxLiabilities_243FCFDBBAAD09345E9C08E1E692A117" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/TaxesNetOperatingLossCarryforwardsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_AB1D6F1D81B587AC9AB4FDCE20B2C15A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_B0BB99D0AF22EA62BE99FDCE20A8C8AE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_AB1D6F1D81B587AC9AB4FDCE20B2C15A" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_B0BB99D0AF22EA62BE99FDCE20A8C8AE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_C12F3E8B9CCB46DF393CFDCE20A89AB6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_B0BB99D0AF22EA62BE99FDCE20A8C8AE" xlink:to="loc_dei_LegalEntityAxis_C12F3E8B9CCB46DF393CFDCE20A89AB6" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_DAA95500276A1696803EFDCE20A8B3CB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_C12F3E8B9CCB46DF393CFDCE20A89AB6" xlink:to="loc_dei_EntityDomain_DAA95500276A1696803EFDCE20A8B3CB_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_DAA95500276A1696803EFDCE20A8B3CB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_C12F3E8B9CCB46DF393CFDCE20A89AB6" xlink:to="loc_dei_EntityDomain_DAA95500276A1696803EFDCE20A8B3CB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_EBAD7458F85CA4B4E095FDCE20A9D093" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_DAA95500276A1696803EFDCE20A8B3CB" xlink:to="loc_evrg_WestarEnergyIncMember_EBAD7458F85CA4B4E095FDCE20A9D093" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_E54A896DF3B7867836BEFDCE20A9C974" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_DAA95500276A1696803EFDCE20A8B3CB" xlink:to="loc_evrg_KCPLMember_E54A896DF3B7867836BEFDCE20A9C974" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_D19683834BD541895B9EFDCE20A9129E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_B0BB99D0AF22EA62BE99FDCE20A8C8AE" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_D19683834BD541895B9EFDCE20A9129E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_45F76AB75AAA5BAB6ABEFDCE20AA58E4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_D19683834BD541895B9EFDCE20A9129E" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_45F76AB75AAA5BAB6ABEFDCE20AA58E4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_45F76AB75AAA5BAB6ABEFDCE20AA58E4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_D19683834BD541895B9EFDCE20A9129E" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_45F76AB75AAA5BAB6ABEFDCE20AA58E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InternalRevenueServiceIRSMember" xlink:label="loc_us-gaap_InternalRevenueServiceIRSMember_693B3B01D38129AB2551FDCE20AA8E6F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_45F76AB75AAA5BAB6ABEFDCE20AA58E4" xlink:to="loc_us-gaap_InternalRevenueServiceIRSMember_693B3B01D38129AB2551FDCE20AA8E6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_72CCADDB779D186FAE5BFDCE20AADDA8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_45F76AB75AAA5BAB6ABEFDCE20AA58E4" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_72CCADDB779D186FAE5BFDCE20AADDA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_BE16F9FCE29D01B7C603FDCE20AA8F89" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_B0BB99D0AF22EA62BE99FDCE20A8C8AE" xlink:to="loc_srt_ConsolidatedEntitiesAxis_BE16F9FCE29D01B7C603FDCE20AA8F89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_E1F1DC99A00E0B34E305FDCE20AB58BC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_BE16F9FCE29D01B7C603FDCE20AA8F89" xlink:to="loc_srt_ConsolidatedEntitiesDomain_E1F1DC99A00E0B34E305FDCE20AB58BC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_E1F1DC99A00E0B34E305FDCE20AB58BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_BE16F9FCE29D01B7C603FDCE20AA8F89" xlink:to="loc_srt_ConsolidatedEntitiesDomain_E1F1DC99A00E0B34E305FDCE20AB58BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SubsidiariesMember" xlink:label="loc_srt_SubsidiariesMember_B4692195B455837BB292FDCE20ABAC86" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_E1F1DC99A00E0B34E305FDCE20AB58BC" xlink:to="loc_srt_SubsidiariesMember_B4692195B455837BB292FDCE20ABAC86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_C1E987DBBE30746F2029FDCE20AB6674" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_B0BB99D0AF22EA62BE99FDCE20A8C8AE" xlink:to="loc_srt_RangeAxis_C1E987DBBE30746F2029FDCE20AB6674" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_37998E2BB95311A303D5FDCE20B12E84_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_C1E987DBBE30746F2029FDCE20AB6674" xlink:to="loc_srt_RangeMember_37998E2BB95311A303D5FDCE20B12E84_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_37998E2BB95311A303D5FDCE20B12E84" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_C1E987DBBE30746F2029FDCE20AB6674" xlink:to="loc_srt_RangeMember_37998E2BB95311A303D5FDCE20B12E84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_07678B312A0AC95678C5FDCE20B15200" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_37998E2BB95311A303D5FDCE20B12E84" xlink:to="loc_srt_MinimumMember_07678B312A0AC95678C5FDCE20B15200" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_96A86AC3B617FC941D97FDCE20B20059" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_37998E2BB95311A303D5FDCE20B12E84" xlink:to="loc_srt_MaximumMember_96A86AC3B617FC941D97FDCE20B20059" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="loc_us-gaap_OperatingLossCarryforwards_C1F77E4BDFABB1E37483FDCE20B3D08B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_AB1D6F1D81B587AC9AB4FDCE20B2C15A" xlink:to="loc_us-gaap_OperatingLossCarryforwards_C1F77E4BDFABB1E37483FDCE20B3D08B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmountOfNetOperatingLossesRelatedToBusinessAcquisition" xlink:label="loc_evrg_AmountOfNetOperatingLossesRelatedToBusinessAcquisition_DFB13C8B590758FFD496FDCE20B30EBE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_AB1D6F1D81B587AC9AB4FDCE20B2C15A" xlink:to="loc_evrg_AmountOfNetOperatingLossesRelatedToBusinessAcquisition_DFB13C8B590758FFD496FDCE20B30EBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLossCarryforwardsValuationAllowance" xlink:label="loc_us-gaap_OperatingLossCarryforwardsValuationAllowance_73C2436B47E6D2BD384AFDCE20B3A3C8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_AB1D6F1D81B587AC9AB4FDCE20B2C15A" xlink:to="loc_us-gaap_OperatingLossCarryforwardsValuationAllowance_73C2436B47E6D2BD384AFDCE20B3A3C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLossCarryforwardsExpirationDate" xlink:label="loc_us-gaap_OperatingLossCarryforwardsExpirationDate_8019FC3E12C2B33B3953FDCE20B38200" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_AB1D6F1D81B587AC9AB4FDCE20B2C15A" xlink:to="loc_us-gaap_OperatingLossCarryforwardsExpirationDate_8019FC3E12C2B33B3953FDCE20B38200" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossesYearOfOriginationAbstract" xlink:label="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_AB1D6F1D81B587AC9AB4FDCE20B2C15A" xlink:to="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryforwardsOriginatingIn2003" xlink:label="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2003_9D8DFBB29F5D4556C2F2FDCE20B4A80B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2003_9D8DFBB29F5D4556C2F2FDCE20B4A80B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryfowardsOriginatingIn2004" xlink:label="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2004_DBDD3176EB8A856846ADFDCE20B44477" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2004_DBDD3176EB8A856846ADFDCE20B44477" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryfowardsOriginatingIn2005" xlink:label="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2005_436B2EC4AB3A3B56FE65FDCE20B44C7B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2005_436B2EC4AB3A3B56FE65FDCE20B44C7B" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryfowardsOriginatingIn2006" xlink:label="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2006_5292F5352D3213ABB383FDCE20B48F93" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2006_5292F5352D3213ABB383FDCE20B48F93" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryfowardsOriginatingIn2007" xlink:label="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2007_96348AC8AE4685E4C543FDCE20B4CDC3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2007_96348AC8AE4685E4C543FDCE20B4CDC3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryfowardsOriginatingIn2008" xlink:label="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2008_C2B76DB2437F2B11EAA2FDCE20B571FE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2008_C2B76DB2437F2B11EAA2FDCE20B571FE" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryfowardsOriginatingIn2009" xlink:label="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2009_D950771830DC5DFCC424FDCE20B5A9F2" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2009_D950771830DC5DFCC424FDCE20B5A9F2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryfowardsOriginatingIn2010" xlink:label="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2010_D0EE3AEE0DACBB74BDCDFDCE20B536FF" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2010_D0EE3AEE0DACBB74BDCDFDCE20B536FF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryfowardsOriginatingIn2011" xlink:label="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2011_ABBD5A1C4058DF4B2217FDCE20B5E084" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryfowardsOriginatingIn2011_ABBD5A1C4058DF4B2217FDCE20B5E084" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryforwardsOriginatingIn2012" xlink:label="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2012_A6AD571C9EB525B81455FDCE20B68604" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2012_A6AD571C9EB525B81455FDCE20B68604" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryforwardsOriginatingIn2013" xlink:label="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2013_6427C8B0A3E14BEA6BB0FDCE20B60C2E" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2013_6427C8B0A3E14BEA6BB0FDCE20B60C2E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryforwardsOriginatingIn2014" xlink:label="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2014_690D543EC0613833392FFDCE20B61DF0" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2014_690D543EC0613833392FFDCE20B61DF0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryForwardsOriginatingIn2015" xlink:label="loc_evrg_NetOperatingLossCarryForwardsOriginatingIn2015_42C478299A5DFD428A28FDCE20B6F99C" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryForwardsOriginatingIn2015_42C478299A5DFD428A28FDCE20B6F99C" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryforwardsOriginatingin2016" xlink:label="loc_evrg_NetOperatingLossCarryforwardsOriginatingin2016_78AABA6D1A3929167A22FDCE20B729F1" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryforwardsOriginatingin2016_78AABA6D1A3929167A22FDCE20B729F1" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryforwardsOriginatingin2017" xlink:label="loc_evrg_NetOperatingLossCarryforwardsOriginatingin2017_41A72407E2E9ED779767FDCE20B7F7F9" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryforwardsOriginatingin2017_41A72407E2E9ED779767FDCE20B7F7F9" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_NetOperatingLossCarryforwardsOriginatingIn2018" xlink:label="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2018_2E574CBB0048C063F5E6FDCE20B71237" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_evrg_NetOperatingLossesYearOfOriginationAbstract_81735F90AEF0E00BCBE5FDCE20B3054B" xlink:to="loc_evrg_NetOperatingLossCarryforwardsOriginatingIn2018_2E574CBB0048C063F5E6FDCE20B71237" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/TaxesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/TaxesTaxCreditCarryforwardsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardLineItems" xlink:label="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardTable" xlink:label="loc_us-gaap_TaxCreditCarryforwardTable_7A12ADC5E17832F4FCBBFDCE25D2C4FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_us-gaap_TaxCreditCarryforwardTable_7A12ADC5E17832F4FCBBFDCE25D2C4FE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardAxis" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_3D2E76092662455D15A0FDCE25D35435" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TaxCreditCarryforwardTable_7A12ADC5E17832F4FCBBFDCE25D2C4FE" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_3D2E76092662455D15A0FDCE25D35435" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_8FB4F9406043B2ACEFA7FDCE25D36259_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_3D2E76092662455D15A0FDCE25D35435" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_8FB4F9406043B2ACEFA7FDCE25D36259_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_8FB4F9406043B2ACEFA7FDCE25D36259" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_3D2E76092662455D15A0FDCE25D35435" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_8FB4F9406043B2ACEFA7FDCE25D36259" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeneralBusinessMember" xlink:label="loc_us-gaap_GeneralBusinessMember_489281D68311DE305033FDCE25D85747" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_8FB4F9406043B2ACEFA7FDCE25D36259" xlink:to="loc_us-gaap_GeneralBusinessMember_489281D68311DE305033FDCE25D85747" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_FederalAlternativeMinimumTaxCreditCarryforwardMember" xlink:label="loc_evrg_FederalAlternativeMinimumTaxCreditCarryforwardMember_07EC7B232F7495DE56ADFDCE25D9F486" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_8FB4F9406043B2ACEFA7FDCE25D36259" xlink:to="loc_evrg_FederalAlternativeMinimumTaxCreditCarryforwardMember_07EC7B232F7495DE56ADFDCE25D9F486" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_CB746B7EA4B10B160E5DFDCE25D99DFF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_8FB4F9406043B2ACEFA7FDCE25D36259" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_CB746B7EA4B10B160E5DFDCE25D99DFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_DBFE936B9BFCE60402EFFDCE25D9864B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TaxCreditCarryforwardTable_7A12ADC5E17832F4FCBBFDCE25D2C4FE" xlink:to="loc_srt_RangeAxis_DBFE936B9BFCE60402EFFDCE25D9864B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_0BE5E6E1C87146483FFCFDCE25DA1C86_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_DBFE936B9BFCE60402EFFDCE25D9864B" xlink:to="loc_srt_RangeMember_0BE5E6E1C87146483FFCFDCE25DA1C86_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_0BE5E6E1C87146483FFCFDCE25DA1C86" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_DBFE936B9BFCE60402EFFDCE25D9864B" xlink:to="loc_srt_RangeMember_0BE5E6E1C87146483FFCFDCE25DA1C86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_83297418608FFBC4AFABFDCE25DAEFD0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0BE5E6E1C87146483FFCFDCE25DA1C86" xlink:to="loc_srt_MinimumMember_83297418608FFBC4AFABFDCE25DAEFD0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_A69281700F3C86E1FAD5FDCE25DA0EA2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0BE5E6E1C87146483FFCFDCE25DA1C86" xlink:to="loc_srt_MaximumMember_A69281700F3C86E1FAD5FDCE25DA0EA2" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_7B41CF9F7469A238E024FDCE25DA34D8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TaxCreditCarryforwardTable_7A12ADC5E17832F4FCBBFDCE25D2C4FE" xlink:to="loc_dei_LegalEntityAxis_7B41CF9F7469A238E024FDCE25DA34D8" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_D67D99121143566CA114FDCE25DB26FC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7B41CF9F7469A238E024FDCE25DA34D8" xlink:to="loc_dei_EntityDomain_D67D99121143566CA114FDCE25DB26FC_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_D67D99121143566CA114FDCE25DB26FC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7B41CF9F7469A238E024FDCE25DA34D8" xlink:to="loc_dei_EntityDomain_D67D99121143566CA114FDCE25DB26FC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_383D5CECB461D1F386B1FDCE25DB13ED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_D67D99121143566CA114FDCE25DB26FC" xlink:to="loc_evrg_WestarEnergyIncMember_383D5CECB461D1F386B1FDCE25DB13ED" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_CBFD2F068D9D4E94F670FDCE25DBD9CC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_D67D99121143566CA114FDCE25DB26FC" xlink:to="loc_evrg_KCPLMember_CBFD2F068D9D4E94F670FDCE25DBD9CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_FE3E973A3D7CBC22A984FDCE25DC72D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_FE3E973A3D7CBC22A984FDCE25DC72D3" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_AmountOfTaxCreditAcquiredInBusinessCombination" xlink:label="loc_evrg_AmountOfTaxCreditAcquiredInBusinessCombination_7E60C247D9CD9D714006FDCE25DC66BF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_AmountOfTaxCreditAcquiredInBusinessCombination_7E60C247D9CD9D714006FDCE25DC66BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardDescription" xlink:label="loc_us-gaap_TaxCreditCarryforwardDescription_EF0FC5469710ADC00895FDCE25DCAE51" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_us-gaap_TaxCreditCarryforwardDescription_EF0FC5469710ADC00895FDCE25DCAE51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardExpirationDate" xlink:label="loc_us-gaap_TaxCreditCarryforwardExpirationDate_F2661BB2C8243D4EBD1CFDCE25DD2976" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_us-gaap_TaxCreditCarryforwardExpirationDate_F2661BB2C8243D4EBD1CFDCE25DD2976" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TaxCreditCarryforwardValuationAllowance" xlink:label="loc_us-gaap_TaxCreditCarryforwardValuationAllowance_C7C6F6972657D5946384FDCE25DD7B62" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_us-gaap_TaxCreditCarryforwardValuationAllowance_C7C6F6972657D5946384FDCE25DD7B62" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardOriginatingIn2000" xlink:label="loc_evrg_TaxCreditCarryforwardOriginatingIn2000_B51C60A9FCF910F8C218FDCE25DEDC99" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardOriginatingIn2000_B51C60A9FCF910F8C218FDCE25DEDC99" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2001" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2001_AD86E605540F4F39B940FDCE25DE6FB5" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2001_AD86E605540F4F39B940FDCE25DE6FB5" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2002" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2002_03FCBABCACE2BC662E75FDCE25DE31A0" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2002_03FCBABCACE2BC662E75FDCE25DE31A0" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2003" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2003_3836A24222D921447DC6FDCE25DE4C63" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2003_3836A24222D921447DC6FDCE25DE4C63" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2004" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2004_D1AB9888F036BA4EFA1CFDCE25DFB19F" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2004_D1AB9888F036BA4EFA1CFDCE25DFB19F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2005" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2005_973A90D2DABDEFA843ABFDCE25DE0657" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2005_973A90D2DABDEFA843ABFDCE25DE0657" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2006" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2006_E9E9660FF4FA37DCF347FDCE25DE9794" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2006_E9E9660FF4FA37DCF347FDCE25DE9794" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2007" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2007_CE346EB02B8B2C112668FDCE25DF0047" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2007_CE346EB02B8B2C112668FDCE25DF0047" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2008" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2008_ED381288A14E52C70526FDCE25DF30BC" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2008_ED381288A14E52C70526FDCE25DF30BC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2009" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2009_F7BDA2179597911191BBFDCE25DFCC62" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2009_F7BDA2179597911191BBFDCE25DFCC62" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2010" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2010_D05E9F4E602FACFB8D50FDCE25DE15C6" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2010_D05E9F4E602FACFB8D50FDCE25DE15C6" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2011" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2011_3C43FA44C71FA42B16A8FDCE25DFBC96" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2011_3C43FA44C71FA42B16A8FDCE25DFBC96" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2012" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2012_970B751676AA89CFFD38FDCE25DF29AC" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2012_970B751676AA89CFFD38FDCE25DF29AC" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2013" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2013_12A03584682FE84E5022FDCE25E00FAB" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2013_12A03584682FE84E5022FDCE25E00FAB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2014" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2014_695B8CD2908F846A1373FDCE25E032C7" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2014_695B8CD2908F846A1373FDCE25E032C7" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2015" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2015_A1FFB871364ADFC3988BFDCE25E0CFDB" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2015_A1FFB871364ADFC3988BFDCE25E0CFDB" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2016" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2016_B5CA64C7555A489559EBFDCE25E0C829" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2016_B5CA64C7555A489559EBFDCE25E0C829" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2017" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2017_4EEBACE4DB1AC332E6EFFDCE25E0AF50" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2017_4EEBACE4DB1AC332E6EFFDCE25E0AF50" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_TaxCreditCarryforwardsOriginatingIn2018" xlink:label="loc_evrg_TaxCreditCarryforwardsOriginatingIn2018_44810AF3B03FA042A84EFDCE25E139D5" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_09C9E804546E373860CBFDCE25DC2615" xlink:to="loc_evrg_TaxCreditCarryforwardsOriginatingIn2018_44810AF3B03FA042A84EFDCE25E139D5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/TaxesTaxReformDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_E704C59C4664C4B40C31FDC512CD04A6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_3BE7B607D21B168BCA0BFDC512CB5FE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_E704C59C4664C4B40C31FDC512CD04A6" xlink:to="loc_us-gaap_StatementTable_3BE7B607D21B168BCA0BFDC512CB5FE1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_60E567150834B8CA6B55FDC512CBA873" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3BE7B607D21B168BCA0BFDC512CB5FE1" xlink:to="loc_dei_LegalEntityAxis_60E567150834B8CA6B55FDC512CBA873" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1DBBC838489F1E80E7E6FDC512CC340F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_60E567150834B8CA6B55FDC512CBA873" xlink:to="loc_dei_EntityDomain_1DBBC838489F1E80E7E6FDC512CC340F_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_1DBBC838489F1E80E7E6FDC512CC340F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_60E567150834B8CA6B55FDC512CBA873" xlink:to="loc_dei_EntityDomain_1DBBC838489F1E80E7E6FDC512CC340F" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_31BAB83A1E5147D4F4F2FDC512CCEAEF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1DBBC838489F1E80E7E6FDC512CC340F" xlink:to="loc_evrg_WestarEnergyIncMember_31BAB83A1E5147D4F4F2FDC512CCEAEF" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KCPLMember" xlink:label="loc_evrg_KCPLMember_F8B13FE7598915183966FDC512CC3878" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1DBBC838489F1E80E7E6FDC512CC340F" xlink:to="loc_evrg_KCPLMember_F8B13FE7598915183966FDC512CC3878" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="loc_us-gaap_RegulatoryLiabilityAxis_0CA3DC5B4B2B2175AD7DFDC512CC3C80" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3BE7B607D21B168BCA0BFDC512CB5FE1" xlink:to="loc_us-gaap_RegulatoryLiabilityAxis_0CA3DC5B4B2B2175AD7DFDC512CC3C80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_7778A5263B4B094D9E6CFDC512CD3C5A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_0CA3DC5B4B2B2175AD7DFDC512CC3C80" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_7778A5263B4B094D9E6CFDC512CD3C5A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_7778A5263B4B094D9E6CFDC512CD3C5A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_0CA3DC5B4B2B2175AD7DFDC512CC3C80" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_7778A5263B4B094D9E6CFDC512CD3C5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueSubjectToRefundMember" xlink:label="loc_us-gaap_RevenueSubjectToRefundMember_EC6CBB36E7EF506A2164FDC512CD6AF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_7778A5263B4B094D9E6CFDC512CD3C5A" xlink:to="loc_us-gaap_RevenueSubjectToRefundMember_EC6CBB36E7EF506A2164FDC512CD6AF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_570614A806CF7782D3CFFDC512CDD9F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E704C59C4664C4B40C31FDC512CD04A6" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_570614A806CF7782D3CFFDC512CDD9F8" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncreaseDecreaseInNetDeferredIncomeTaxLiabilitiesDuetoTaxReform" xlink:label="loc_evrg_IncreaseDecreaseInNetDeferredIncomeTaxLiabilitiesDuetoTaxReform_92DB68C3424D04638798FDC512CE9712" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E704C59C4664C4B40C31FDC512CD04A6" xlink:to="loc_evrg_IncreaseDecreaseInNetDeferredIncomeTaxLiabilitiesDuetoTaxReform_92DB68C3424D04638798FDC512CE9712" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncreaseDecreaseInNetDeferredIncomeTaxLiabilitiesForRevaluationOfRegulatedDeferredIncomeTaxAssetsAndLiabilities" xlink:label="loc_evrg_IncreaseDecreaseInNetDeferredIncomeTaxLiabilitiesForRevaluationOfRegulatedDeferredIncomeTaxAssetsAndLiabilities_3F6A5E7FF9605C898EE6FDC512CE398A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E704C59C4664C4B40C31FDC512CD04A6" xlink:to="loc_evrg_IncreaseDecreaseInNetDeferredIncomeTaxLiabilitiesForRevaluationOfRegulatedDeferredIncomeTaxAssetsAndLiabilities_3F6A5E7FF9605C898EE6FDC512CE398A" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncreaseDecreaseinNetDeferredIncomeTaxLiabilitiesForTaxGrossUpAdjustmentForRatemakingPurposesDueToTaxReform" xlink:label="loc_evrg_IncreaseDecreaseinNetDeferredIncomeTaxLiabilitiesForTaxGrossUpAdjustmentForRatemakingPurposesDueToTaxReform_49583446B2431303FEAAFDC512CEE60E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E704C59C4664C4B40C31FDC512CD04A6" xlink:to="loc_evrg_IncreaseDecreaseinNetDeferredIncomeTaxLiabilitiesForTaxGrossUpAdjustmentForRatemakingPurposesDueToTaxReform_49583446B2431303FEAAFDC512CEE60E" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_IncomeTaxExpenseFromTaxReformTotal" xlink:label="loc_evrg_IncomeTaxExpenseFromTaxReformTotal_847B24A8B6DB7FEDAD1DFDC512CE4D9F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E704C59C4664C4B40C31FDC512CD04A6" xlink:to="loc_evrg_IncomeTaxExpenseFromTaxReformTotal_847B24A8B6DB7FEDAD1DFDC512CE4D9F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/TaxesValuationAllowanceDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowanceLineItems" xlink:label="loc_us-gaap_ValuationAllowanceLineItems_E7D94FD98142401B9DBAEC8D4882BECE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowanceTable" xlink:label="loc_us-gaap_ValuationAllowanceTable_89756865ABFF32A4F64BEC8D4881D15F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_E7D94FD98142401B9DBAEC8D4882BECE" xlink:to="loc_us-gaap_ValuationAllowanceTable_89756865ABFF32A4F64BEC8D4881D15F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowanceByDeferredTaxAssetAxis" xlink:label="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_A8450965A03CE30521ADEC8D48814831" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_89756865ABFF32A4F64BEC8D4881D15F" xlink:to="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_A8450965A03CE30521ADEC8D48814831" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetDomain" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_F4904EF0ED203896EEECEC8D4882A57D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_A8450965A03CE30521ADEC8D48814831" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_F4904EF0ED203896EEECEC8D4882A57D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetDomain" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_F4904EF0ED203896EEECEC8D4882A57D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_A8450965A03CE30521ADEC8D48814831" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_F4904EF0ED203896EEECEC8D4882A57D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_D83BBD675D49373E7657EC8D4882CAEE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_E7D94FD98142401B9DBAEC8D4882BECE" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_D83BBD675D49373E7657EC8D4882CAEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetExplanationOfChange" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetExplanationOfChange_CACC83B7F9817F094928EC8D488276AF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_E7D94FD98142401B9DBAEC8D4882BECE" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetExplanationOfChange_CACC83B7F9817F094928EC8D488276AF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/VariableInterestEntities" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/VariableInterestEntitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityLineItems" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_22F45ECD5E19168BA248FD52992FD43C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_DB16B32EEFF9B5C27931FD52992CFAA6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_22F45ECD5E19168BA248FD52992FD43C" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_DB16B32EEFF9B5C27931FD52992CFAA6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_05ECE4F78CC391643925FD52992D5D91" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_DB16B32EEFF9B5C27931FD52992CFAA6" xlink:to="loc_dei_LegalEntityAxis_05ECE4F78CC391643925FD52992D5D91" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6E285F39B82E68A0733AFD52992DCF70_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_05ECE4F78CC391643925FD52992D5D91" xlink:to="loc_dei_EntityDomain_6E285F39B82E68A0733AFD52992DCF70_default" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_6E285F39B82E68A0733AFD52992DCF70" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_05ECE4F78CC391643925FD52992D5D91" xlink:to="loc_dei_EntityDomain_6E285F39B82E68A0733AFD52992DCF70" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_KansasGasAndElectricCompanyMember" xlink:label="loc_evrg_KansasGasAndElectricCompanyMember_E555C7C9FE2FDBFA85F6FD52992D3E10" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6E285F39B82E68A0733AFD52992DCF70" xlink:to="loc_evrg_KansasGasAndElectricCompanyMember_E555C7C9FE2FDBFA85F6FD52992D3E10" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_WestarEnergyIncMember" xlink:label="loc_evrg_WestarEnergyIncMember_2EF788807FE4BEB4E91BFD52992DA52F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6E285F39B82E68A0733AFD52992DCF70" xlink:to="loc_evrg_WestarEnergyIncMember_2EF788807FE4BEB4E91BFD52992DA52F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_95DC35F775432B729E95FD52992E33B9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_DB16B32EEFF9B5C27931FD52992CFAA6" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_95DC35F775432B729E95FD52992E33B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_BF0798E2BF402D5BC3CEFD52992E53BE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_95DC35F775432B729E95FD52992E33B9" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_BF0798E2BF402D5BC3CEFD52992E53BE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_BF0798E2BF402D5BC3CEFD52992E53BE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_95DC35F775432B729E95FD52992E33B9" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_BF0798E2BF402D5BC3CEFD52992E53BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_0663AD206891D8B70CDEFD52992E9856" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_BF0798E2BF402D5BC3CEFD52992E53BE" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_0663AD206891D8B70CDEFD52992E9856" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_JeffreyEnergyCenterMember" xlink:label="loc_evrg_JeffreyEnergyCenterMember_544A707436C57263C206FD52992EAEF2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_BF0798E2BF402D5BC3CEFD52992E53BE" xlink:to="loc_evrg_JeffreyEnergyCenterMember_544A707436C57263C206FD52992EAEF2" xlink:type="arc" />
    <link:loc xlink:href="evrg-20181231.xsd#evrg_LaCygneUnit2Member" xlink:label="loc_evrg_LaCygneUnit2Member_63BC7F4C1A22FB6B70B5FD52992F1D70" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_BF0798E2BF402D5BC3CEFD52992E53BE" xlink:to="loc_evrg_LaCygneUnit2Member_63BC7F4C1A22FB6B70B5FD52992F1D70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityOwnershipPercentage" xlink:label="loc_us-gaap_VariableInterestEntityOwnershipPercentage_DFE92E0B8C5AFF200BE4FD52992FBC0F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_22F45ECD5E19168BA248FD52992FD43C" xlink:to="loc_us-gaap_VariableInterestEntityOwnershipPercentage_DFE92E0B8C5AFF200BE4FD52992FBC0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_95C6475C86F23C954930FD52992F7AD3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_22F45ECD5E19168BA248FD52992FD43C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_95C6475C86F23C954930FD52992F7AD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_C934F16D1F6518DA2252FD52992F35E5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_22F45ECD5E19168BA248FD52992FD43C" xlink:to="loc_us-gaap_LongTermDebtCurrent_C934F16D1F6518DA2252FD52992F35E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:label="loc_us-gaap_InterestPayableCurrent_CF325341E4A820BE21CCFD52992F983F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_22F45ECD5E19168BA248FD52992FD43C" xlink:to="loc_us-gaap_InterestPayableCurrent_CF325341E4A820BE21CCFD52992F983F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_7ACC3E5337C214C1FAD8FD529930A15E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_22F45ECD5E19168BA248FD52992FD43C" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_7ACC3E5337C214C1FAD8FD529930A15E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.greatplainsenergy.com/role/VariableInterestEntitiesTables" xlink:type="extended" />
</link:linkbase>
