<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:01a01bb4-00ec-7dbe-a1d3-b67bf97b8eec,g:e62dd7c4-c56a-4d36-ac08-708e34c0e698-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="wep-20260930.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_01a01bb4-021d-7ecf-bfcc-c3cec7afa8c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_01a01bb4-021d-7b95-928a-3237b6945a5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-7ecf-bfcc-c3cec7afa8c8" xlink:to="loc_us-gaap_StatementTable_01a01bb4-021d-7b95-928a-3237b6945a5a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_01a01bb4-021d-73ac-8408-7f5e0cf6d5f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a01bb4-021d-7b95-928a-3237b6945a5a" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_01a01bb4-021d-73ac-8408-7f5e0cf6d5f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_01a01bb4-021d-73ac-8408-7f5e0cf6d5f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_01a01bb4-021d-73ac-8408-7f5e0cf6d5f3" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_01a01bb4-021d-73ac-8408-7f5e0cf6d5f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_01a01bb4-021d-72fe-bb61-768f8ebc7ab1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_01a01bb4-021d-73ac-8408-7f5e0cf6d5f3" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_01a01bb4-021d-72fe-bb61-768f8ebc7ab1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_01a01bb4-021d-7344-bd9e-a9b6aff80a46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_01a01bb4-021d-72fe-bb61-768f8ebc7ab1" xlink:to="loc_us-gaap_NonrelatedPartyMember_01a01bb4-021d-7344-bd9e-a9b6aff80a46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_01a01bb4-021d-7c77-9753-c98f6818a8d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_01a01bb4-021d-72fe-bb61-768f8ebc7ab1" xlink:to="loc_us-gaap_RelatedPartyMember_01a01bb4-021d-7c77-9753-c98f6818a8d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-021d-7768-8b97-09b30a64e99c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a01bb4-021d-7b95-928a-3237b6945a5a" xlink:to="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-021d-7768-8b97-09b30a64e99c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-7768-8b97-09b30a64e99c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-021d-7768-8b97-09b30a64e99c" xlink:to="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-7768-8b97-09b30a64e99c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-782c-9349-d8c62e3f546f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-021d-7768-8b97-09b30a64e99c" xlink:to="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-782c-9349-d8c62e3f546f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_01a01bb4-021d-7786-b030-5d5f50b7a976" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-782c-9349-d8c62e3f546f" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_01a01bb4-021d-7786-b030-5d5f50b7a976" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_01a01bb4-021d-773a-a9ee-d2749ee6d0a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-7ecf-bfcc-c3cec7afa8c8" xlink:to="loc_us-gaap_AssetsAbstract_01a01bb4-021d-773a-a9ee-d2749ee6d0a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a01bb4-021d-773a-a9ee-d2749ee6d0a0" xlink:to="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_01a01bb4-021d-7435-af60-ec857bff9fe0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_01a01bb4-021d-7435-af60-ec857bff9fe0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_01a01bb4-021d-78fd-9d48-7f83ff27a1f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsAndOtherReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:to="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_01a01bb4-021d-78fd-9d48-7f83ff27a1f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnergyRelatedInventory_01a01bb4-021d-7804-bba3-cdde176fbed9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnergyRelatedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:to="loc_us-gaap_EnergyRelatedInventory_01a01bb4-021d-7804-bba3-cdde176fbed9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidTaxes_01a01bb4-021d-7821-91fa-60e6f54433f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:to="loc_us-gaap_PrepaidTaxes_01a01bb4-021d-7821-91fa-60e6f54433f8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPrepaidExpenseCurrent_01a01bb4-021d-75ad-a519-c304914834d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherPrepaidExpenseCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:to="loc_us-gaap_OtherPrepaidExpenseCurrent_01a01bb4-021d-75ad-a519-c304914834d1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_01a01bb4-021d-7785-be50-a701f30875b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:to="loc_us-gaap_OtherAssetsCurrent_01a01bb4-021d-7785-be50-a701f30875b0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_01a01bb4-021d-7895-9b6c-ec4ac5bad995" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_01a01bb4-021d-73e5-a31b-430e0ca1f527" xlink:to="loc_us-gaap_AssetsCurrent_01a01bb4-021d-7895-9b6c-ec4ac5bad995" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrentAbstract_01a01bb4-021d-7c5c-8a02-9bcb3ec48509" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a01bb4-021d-773a-a9ee-d2749ee6d0a0" xlink:to="loc_us-gaap_AssetsNoncurrentAbstract_01a01bb4-021d-7c5c-8a02-9bcb3ec48509" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_01a01bb4-021d-7f95-856c-9b76636c9513" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsNoncurrentAbstract_01a01bb4-021d-7c5c-8a02-9bcb3ec48509" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_01a01bb4-021d-7f95-856c-9b76636c9513" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_01a01bb4-021d-7cbb-8aeb-ef09495f14f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsNoncurrentAbstract_01a01bb4-021d-7c5c-8a02-9bcb3ec48509" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_01a01bb4-021d-7cbb-8aeb-ef09495f14f6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_01a17f31-305c-7ee8-86ba-1e6dc3e6daa5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsNoncurrentAbstract_01a01bb4-021d-7c5c-8a02-9bcb3ec48509" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_01a17f31-305c-7ee8-86ba-1e6dc3e6daa5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_01a01bb4-021d-70a9-9169-ff5a87589042" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsNoncurrentAbstract_01a01bb4-021d-7c5c-8a02-9bcb3ec48509" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_01a01bb4-021d-70a9-9169-ff5a87589042" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_01a01bb4-021d-7973-af17-a05e1de7160f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsNoncurrentAbstract_01a01bb4-021d-7c5c-8a02-9bcb3ec48509" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_01a01bb4-021d-7973-af17-a05e1de7160f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrent_01a01bb4-021d-7f56-b955-6e51a4674907" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsNoncurrentAbstract_01a01bb4-021d-7c5c-8a02-9bcb3ec48509" xlink:to="loc_us-gaap_AssetsNoncurrent_01a01bb4-021d-7f56-b955-6e51a4674907" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_01a01bb4-021d-7329-bc54-13d9b688c73a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a01bb4-021d-773a-a9ee-d2749ee6d0a0" xlink:to="loc_us-gaap_Assets_01a01bb4-021d-7329-bc54-13d9b688c73a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a01bb4-021d-709a-821b-685457ed914a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-7ecf-bfcc-c3cec7afa8c8" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a01bb4-021d-709a-821b-685457ed914a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a01bb4-021d-709a-821b-685457ed914a" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaper_01a01bb4-021d-73b4-af17-e49043cd03f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaper"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:to="loc_us-gaap_CommercialPaper_01a01bb4-021d-73b4-af17-e49043cd03f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_01a01bb4-021d-7190-889b-cc21ab25d6b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:to="loc_us-gaap_LongTermDebtCurrent_01a01bb4-021d-7190-889b-cc21ab25d6b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_01a01bb4-021d-7b4d-ba2b-59860cef9155" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_01a01bb4-021d-7b4d-ba2b-59860cef9155" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_01a01bb4-021d-7fe2-84ff-eef57d930b2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:to="loc_us-gaap_AccountsPayableCurrent_01a01bb4-021d-7fe2-84ff-eef57d930b2b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_01a17f3c-fe74-7933-8244-f8db5a492369" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:to="loc_us-gaap_InterestPayableCurrent_01a17f3c-fe74-7933-8244-f8db5a492369" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_01a01bb4-021d-72d4-afc4-d610baebfdf9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_01a01bb4-021d-72d4-afc4-d610baebfdf9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_01a01bb4-021d-7d5a-8444-33787b1e0aa6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_01a01bb4-021d-72e9-8919-fbfa1ae6259e" xlink:to="loc_us-gaap_LiabilitiesCurrent_01a01bb4-021d-7d5a-8444-33787b1e0aa6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_01a01bb4-021d-7ca9-9fc5-e19a2b8804c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a01bb4-021d-709a-821b-685457ed914a" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_01a01bb4-021d-7ca9-9fc5-e19a2b8804c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_01a01bb4-021d-722e-be8a-39e59bcb38aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_01a01bb4-021d-7ca9-9fc5-e19a2b8804c3" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_01a01bb4-021d-722e-be8a-39e59bcb38aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_01a01bb4-021d-7487-9eb7-307f4dcc6937" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_01a01bb4-021d-7ca9-9fc5-e19a2b8804c3" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_01a01bb4-021d-7487-9eb7-307f4dcc6937" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_01a01bb4-021d-77a6-a18b-495188abd165" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_01a01bb4-021d-7ca9-9fc5-e19a2b8804c3" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_01a01bb4-021d-77a6-a18b-495188abd165" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_01a01bb4-021d-758f-b69b-a33328be6d7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_01a01bb4-021d-7ca9-9fc5-e19a2b8804c3" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_01a01bb4-021d-758f-b69b-a33328be6d7c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_01a01bb4-021d-7ff4-aedf-f04257a258f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_01a01bb4-021d-7ca9-9fc5-e19a2b8804c3" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_01a01bb4-021d-7ff4-aedf-f04257a258f3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_01a01bb4-021d-7c72-b220-18ec5946bb55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_01a01bb4-021d-7ca9-9fc5-e19a2b8804c3" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_01a01bb4-021d-7c72-b220-18ec5946bb55" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_01a01bb4-021d-77ac-859e-dd9bc7deec1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a01bb4-021d-709a-821b-685457ed914a" xlink:to="loc_us-gaap_CommitmentsAndContingencies_01a01bb4-021d-77ac-859e-dd9bc7deec1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityAbstract_01a01bb4-021d-70dd-b2bb-51476698aa14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a01bb4-021d-709a-821b-685457ed914a" xlink:to="loc_us-gaap_EquityAbstract_01a01bb4-021d-70dd-b2bb-51476698aa14" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_01a01bb4-021d-723b-a230-bca8c31eb37a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_01a01bb4-021d-70dd-b2bb-51476698aa14" xlink:to="loc_us-gaap_CommonStockValue_01a01bb4-021d-723b-a230-bca8c31eb37a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_01a01bb4-021d-7eaf-ae76-99d41fbedd47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_01a01bb4-021d-70dd-b2bb-51476698aa14" xlink:to="loc_us-gaap_AdditionalPaidInCapital_01a01bb4-021d-7eaf-ae76-99d41fbedd47" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_01a01bb4-021d-7287-ad84-ada1bd147bbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_01a01bb4-021d-70dd-b2bb-51476698aa14" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_01a01bb4-021d-7287-ad84-ada1bd147bbb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TotalCommonShareholdersEquity_01a01bb4-021d-7ca4-9aee-1e3f0c209d05" xlink:href="wep-20260930.xsd#wep_TotalCommonShareholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_01a01bb4-021d-70dd-b2bb-51476698aa14" xlink:to="loc_wep_TotalCommonShareholdersEquity_01a01bb4-021d-7ca4-9aee-1e3f0c209d05" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_01a01bb4-021d-7c8a-a6d2-235e84edd334" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a01bb4-021d-709a-821b-685457ed914a" xlink:to="loc_us-gaap_PreferredStockValue_01a01bb4-021d-7c8a-a6d2-235e84edd334" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_01a01bb4-021d-78e9-9258-c1a2b1fb478e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_01a01bb4-021d-709a-821b-685457ed914a" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_01a01bb4-021d-78e9-9258-c1a2b1fb478e" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSPARENTHETICALS" xlink:type="simple" xlink:href="wep-20260930.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSPARENTHETICALS"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSPARENTHETICALS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_01a01bb4-021d-738d-8b33-4e3746ae573e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_01a01bb4-021d-7de4-8871-d74a05d77bda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-738d-8b33-4e3746ae573e" xlink:to="loc_us-gaap_StatementTable_01a01bb4-021d-7de4-8871-d74a05d77bda" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-021d-78e7-8615-08f2445be50f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a01bb4-021d-7de4-8871-d74a05d77bda" xlink:to="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-021d-78e7-8615-08f2445be50f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-78e7-8615-08f2445be50f_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-021d-78e7-8615-08f2445be50f" xlink:to="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-78e7-8615-08f2445be50f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-7fa2-a77d-2755f521a8d8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-021d-78e7-8615-08f2445be50f" xlink:to="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-7fa2-a77d-2755f521a8d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_01a01bb4-021d-7c8f-88f4-14e3aa42f477" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-021d-7fa2-a77d-2755f521a8d8" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_01a01bb4-021d-7c8f-88f4-14e3aa42f477" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_01a01bb4-021d-7792-aa71-877a133680df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-738d-8b33-4e3746ae573e" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_01a01bb4-021d-7792-aa71-877a133680df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_01a01bb4-021d-73a0-9db8-c781162f2e94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-738d-8b33-4e3746ae573e" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_01a01bb4-021d-73a0-9db8-c781162f2e94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_01a01bb4-021d-76f0-9cb0-cd00d16e2c88" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-738d-8b33-4e3746ae573e" xlink:to="loc_us-gaap_LongTermDebtCurrent_01a01bb4-021d-76f0-9cb0-cd00d16e2c88" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="simple" xlink:href="wep-20260930.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_01a01bb4-021d-7b54-bdba-d1a1ec1bd02a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_01a01bb4-021d-7e12-8477-cd7f155da627" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-7b54-bdba-d1a1ec1bd02a" xlink:to="loc_us-gaap_StatementTable_01a01bb4-021d-7e12-8477-cd7f155da627" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_01a01bb4-021d-767f-a63b-4de2152d6e3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_01a01bb4-021d-7e12-8477-cd7f155da627" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_01a01bb4-021d-767f-a63b-4de2152d6e3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_01a01bb4-021d-767f-a63b-4de2152d6e3f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_01a01bb4-021d-767f-a63b-4de2152d6e3f" xlink:to="loc_us-gaap_EquityComponentDomain_01a01bb4-021d-767f-a63b-4de2152d6e3f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_01a01bb4-021d-7a16-9f81-fc346e46f87c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_01a01bb4-021d-767f-a63b-4de2152d6e3f" xlink:to="loc_us-gaap_EquityComponentDomain_01a01bb4-021d-7a16-9f81-fc346e46f87c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_01a01bb4-021d-7785-a4a4-8f2b8d2da497" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_01a01bb4-021d-7a16-9f81-fc346e46f87c" xlink:to="loc_us-gaap_ParentMember_01a01bb4-021d-7785-a4a4-8f2b8d2da497" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_01a01bb4-021d-786e-b947-e9592df56343" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_01a01bb4-021d-7785-a4a4-8f2b8d2da497" xlink:to="loc_us-gaap_CommonStockMember_01a01bb4-021d-786e-b947-e9592df56343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_01a01bb4-021d-7c7f-b74e-acb4b1fbdd15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_01a01bb4-021d-7785-a4a4-8f2b8d2da497" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_01a01bb4-021d-7c7f-b74e-acb4b1fbdd15" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_01a01bb4-021d-7504-911d-456fb94598ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_01a01bb4-021d-7785-a4a4-8f2b8d2da497" xlink:to="loc_us-gaap_RetainedEarningsMember_01a01bb4-021d-7504-911d-456fb94598ee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_01a01bb4-021d-7b6b-ae88-9af0084d9bf2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_01a01bb4-021d-7a16-9f81-fc346e46f87c" xlink:to="loc_us-gaap_PreferredStockMember_01a01bb4-021d-7b6b-ae88-9af0084d9bf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a01bb4-021d-7987-8f14-a981dcfad680" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_01a01bb4-021d-7b54-bdba-d1a1ec1bd02a" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a01bb4-021d-7987-8f14-a981dcfad680" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_01a01bb4-021d-70d5-a445-39ce5c86c37f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a01bb4-021d-7987-8f14-a981dcfad680" xlink:to="loc_us-gaap_StockholdersEquity_01a01bb4-021d-70d5-a445-39ce5c86c37f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_01a01bb4-021d-77c0-a141-f51c939b74fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a01bb4-021d-7987-8f14-a981dcfad680" xlink:to="loc_us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_01a01bb4-021d-77c0-a141-f51c939b74fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDistributionsToAffiliates_01a01bb4-021d-712e-a7cf-993068aeaf27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDistributionsToAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a01bb4-021d-7987-8f14-a981dcfad680" xlink:to="loc_us-gaap_PaymentsOfDistributionsToAffiliates_01a01bb4-021d-712e-a7cf-993068aeaf27" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromContributionsFromParent_01a01bb4-021d-7564-9921-6fac241ddd38" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromContributionsFromParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a01bb4-021d-7987-8f14-a981dcfad680" xlink:to="loc_us-gaap_ProceedsFromContributionsFromParent_01a01bb4-021d-7564-9921-6fac241ddd38" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityOther_01a01bb4-021d-7cbb-85b0-dc42b1fb65be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_01a01bb4-021d-7987-8f14-a981dcfad680" xlink:to="loc_us-gaap_StockholdersEquityOther_01a01bb4-021d-7cbb-85b0-dc42b1fb65be" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_01a01bb4-021d-72d2-bf11-f31ca8ef64d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/OPERATINGREVENUESTables" xlink:type="simple" xlink:href="wep-20260930.xsd#OPERATINGREVENUESTables"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/OPERATINGREVENUESTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7560-9928-316ae3ab564a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7c42-94d1-9f732646284b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7560-9928-316ae3ab564a" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7c42-94d1-9f732646284b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-76b1-8b82-a51a595a15f3" xlink:href="wep-20260930.xsd#wep_TypesofOperatingRevenuesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7c42-94d1-9f732646284b" xlink:to="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-76b1-8b82-a51a595a15f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-76b1-8b82-a51a595a15f3_default" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-76b1-8b82-a51a595a15f3" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-76b1-8b82-a51a595a15f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7a6e-b013-ede77b689edf" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-76b1-8b82-a51a595a15f3" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7a6e-b013-ede77b689edf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_01a01bb4-021d-7da4-a8df-bc9dfdb4d900" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7a6e-b013-ede77b689edf" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_01a01bb4-021d-7da4-a8df-bc9dfdb4d900" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_OtheroperatingrevenuesMember_01a01bb4-021d-7ea5-b26b-8809d205463f" xlink:href="wep-20260930.xsd#wep_OtheroperatingrevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7a6e-b013-ede77b689edf" xlink:to="loc_wep_OtheroperatingrevenuesMember_01a01bb4-021d-7ea5-b26b-8809d205463f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-75a2-b1ab-d0a3d50e5d40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7c42-94d1-9f732646284b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-75a2-b1ab-d0a3d50e5d40" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-75a2-b1ab-d0a3d50e5d40_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-75a2-b1ab-d0a3d50e5d40" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-75a2-b1ab-d0a3d50e5d40_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-7c50-84c7-ed5c8859fe07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-75a2-b1ab-d0a3d50e5d40" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-7c50-84c7-ed5c8859fe07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UtilitySegmentMember_01a01bb4-021d-7373-bae9-d950c93eb037" xlink:href="wep-20260930.xsd#wep_UtilitySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-021d-7c50-84c7-ed5c8859fe07" xlink:to="loc_wep_UtilitySegmentMember_01a01bb4-021d-7373-bae9-d950c93eb037" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7195-938a-72938f5979f6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7c42-94d1-9f732646284b" xlink:to="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7195-938a-72938f5979f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7195-938a-72938f5979f6_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7195-938a-72938f5979f6" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7195-938a-72938f5979f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7349-ae33-eae7d2573b36" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7195-938a-72938f5979f6" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7349-ae33-eae7d2573b36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-021d-76b3-90f3-5ed8c27872fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ElectricityUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7349-ae33-eae7d2573b36" xlink:to="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-021d-76b3-90f3-5ed8c27872fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-021d-7099-9046-7c7bc5168187" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NaturalGasUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7349-ae33-eae7d2573b36" xlink:to="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-021d-7099-9046-7c7bc5168187" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_01a01bb4-021d-7922-a214-3461fb2ffb61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7560-9928-316ae3ab564a" xlink:to="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_01a01bb4-021d-7922-a214-3461fb2ffb61" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/REGULATORYENVIRONMENTTables" xlink:type="simple" xlink:href="wep-20260930.xsd#REGULATORYENVIRONMENTTables"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/REGULATORYENVIRONMENTTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7ae9-b2a3-8697fc209d01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7280-9879-6a8a6929e4e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7ae9-b2a3-8697fc209d01" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7280-9879-6a8a6929e4e2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-797d-b32f-ab850750ac69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7280-9879-6a8a6929e4e2" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-797d-b32f-ab850750ac69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-797d-b32f-ab850750ac69_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-797d-b32f-ab850750ac69" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-797d-b32f-ab850750ac69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7d54-a298-ab8337918574" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-797d-b32f-ab850750ac69" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7d54-a298-ab8337918574" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PublicServiceCommissionofWisconsinMember_01a01bb4-02b5-707b-af81-56dd9d494e90" xlink:href="wep-20260930.xsd#wep_PublicServiceCommissionofWisconsinMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7d54-a298-ab8337918574" xlink:to="loc_wep_PublicServiceCommissionofWisconsinMember_01a01bb4-02b5-707b-af81-56dd9d494e90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-7d99-a586-64d5b5a4ab2e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7280-9879-6a8a6929e4e2" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-7d99-a586-64d5b5a4ab2e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-7d99-a586-64d5b5a4ab2e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-7d99-a586-64d5b5a4ab2e" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-7d99-a586-64d5b5a4ab2e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-7c1b-8a13-ff30340a09a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-7d99-a586-64d5b5a4ab2e" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-7c1b-8a13-ff30340a09a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_A2027And2028RateCaseMember_01a01bb4-02b5-72b0-8e8e-976480e31b71" xlink:href="wep-20260930.xsd#wep_A2027And2028RateCaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-7c1b-8a13-ff30340a09a8" xlink:to="loc_wep_A2027And2028RateCaseMember_01a01bb4-02b5-72b0-8e8e-976480e31b71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTableTextBlock_01a01bb4-02b5-71fd-8de7-1f81ba6b3b1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7ae9-b2a3-8697fc209d01" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTableTextBlock_01a01bb4-02b5-71fd-8de7-1f81ba6b3b1b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/GENERALINFORMATIONGENERALDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#GENERALINFORMATIONGENERALDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/GENERALINFORMATIONGENERALDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductInformationLineItems_01a01bb4-021d-748a-8bf2-0585f31944d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProductInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfProductInformationTable_01a01bb4-021d-7577-b9e4-aedc2c2b5fda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfProductInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductInformationLineItems_01a01bb4-021d-748a-8bf2-0585f31944d8" xlink:to="loc_us-gaap_ScheduleOfProductInformationTable_01a01bb4-021d-7577-b9e4-aedc2c2b5fda" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7403-9308-cfdb7e616384" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_01a01bb4-021d-7577-b9e4-aedc2c2b5fda" xlink:to="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7403-9308-cfdb7e616384" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7403-9308-cfdb7e616384_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7403-9308-cfdb7e616384" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7403-9308-cfdb7e616384_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-794b-bccf-ae3b6c43e40d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7403-9308-cfdb7e616384" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-794b-bccf-ae3b6c43e40d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-021d-7df4-b130-bcd49cbfdfbd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ElectricityUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-794b-bccf-ae3b6c43e40d" xlink:to="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-021d-7df4-b130-bcd49cbfdfbd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-021d-78bf-b0c9-b9013a6ff296" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NaturalGasUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-794b-bccf-ae3b6c43e40d" xlink:to="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-021d-78bf-b0c9-b9013a6ff296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NumberOfCustomers_01a01bb4-021d-72bb-980b-9ba17bd03840" xlink:href="wep-20260930.xsd#wep_NumberOfCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_01a01bb4-021d-748a-8bf2-0585f31944d8" xlink:to="loc_wep_NumberOfCustomers_01a01bb4-021d-72bb-980b-9ba17bd03840" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/ACQUISITIONSWESTON4Details" xlink:type="simple" xlink:href="wep-20260930.xsd#ACQUISITIONSWESTON4Details"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/ACQUISITIONSWESTON4Details" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7f4c-8275-5b23f16f1bd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionTable_01a01bb4-021d-7e02-b231-41d6cf2bb3e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7f4c-8275-5b23f16f1bd1" xlink:to="loc_us-gaap_AssetAcquisitionTable_01a01bb4-021d-7e02-b231-41d6cf2bb3e7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_01a01bb4-021d-7517-af70-80f1bc595b65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AssetAcquisitionTable_01a01bb4-021d-7e02-b231-41d6cf2bb3e7" xlink:to="loc_us-gaap_AssetAcquisitionAxis_01a01bb4-021d-7517-af70-80f1bc595b65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7517-af70-80f1bc595b65_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AssetAcquisitionAxis_01a01bb4-021d-7517-af70-80f1bc595b65" xlink:to="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7517-af70-80f1bc595b65_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7ac0-bacb-f9c5f72e4330" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AssetAcquisitionAxis_01a01bb4-021d-7517-af70-80f1bc595b65" xlink:to="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7ac0-bacb-f9c5f72e4330" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WestonUnit4Member_01a01bb4-021d-74a2-89ec-dc4f5d1fe1c7" xlink:href="wep-20260930.xsd#wep_WestonUnit4Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7ac0-bacb-f9c5f72e4330" xlink:to="loc_wep_WestonUnit4Member_01a01bb4-021d-74a2-89ec-dc4f5d1fe1c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_01a01bb4-021d-7e6c-8beb-30937fe8983d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AssetAcquisitionTable_01a01bb4-021d-7e02-b231-41d6cf2bb3e7" xlink:to="loc_dei_LegalEntityAxis_01a01bb4-021d-7e6c-8beb-30937fe8983d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a01bb4-021d-7e6c-8beb-30937fe8983d_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_01a01bb4-021d-7e6c-8beb-30937fe8983d" xlink:to="loc_dei_EntityDomain_01a01bb4-021d-7e6c-8beb-30937fe8983d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a01bb4-021d-773e-8b3c-af22d546467c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_01a01bb4-021d-7e6c-8beb-30937fe8983d" xlink:to="loc_dei_EntityDomain_01a01bb4-021d-773e-8b3c-af22d546467c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WisconsinElectricPowerCompanyMember_01a01bb4-021d-7546-8ab0-d4cc470af551" xlink:href="wep-20260930.xsd#wep_WisconsinElectricPowerCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_01a01bb4-021d-773e-8b3c-af22d546467c" xlink:to="loc_wep_WisconsinElectricPowerCompanyMember_01a01bb4-021d-7546-8ab0-d4cc470af551" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WisconsinPublicServiceCorporationMember_01a01bb4-021d-79d7-bd36-608577a7f69c" xlink:href="wep-20260930.xsd#wep_WisconsinPublicServiceCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_01a01bb4-021d-773e-8b3c-af22d546467c" xlink:to="loc_wep_WisconsinPublicServiceCorporationMember_01a01bb4-021d-79d7-bd36-608577a7f69c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_01a01bb4-021d-7822-b0d7-88a05f7aa65c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7f4c-8275-5b23f16f1bd1" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_01a01bb4-021d-7822-b0d7-88a05f7aa65c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CapacityOfGenerationUnit_01a01bb4-021d-783e-bf04-db77be4cfa54" xlink:href="wep-20260930.xsd#wep_CapacityOfGenerationUnit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7f4c-8275-5b23f16f1bd1" xlink:to="loc_wep_CapacityOfGenerationUnit_01a01bb4-021d-783e-bf04-db77be4cfa54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionPriceOfAcquisitionExpected_01a01bb4-021d-703c-988b-20082bbdd659" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionPriceOfAcquisitionExpected"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7f4c-8275-5b23f16f1bd1" xlink:to="loc_us-gaap_AssetAcquisitionPriceOfAcquisitionExpected_01a01bb4-021d-703c-988b-20082bbdd659" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/ACQUISITIONSWHITETAILDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#ACQUISITIONSWHITETAILDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/ACQUISITIONSWHITETAILDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7389-a81d-04a36fcf1932" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionTable_01a01bb4-021d-79ce-bff0-f9d55ff4d5e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7389-a81d-04a36fcf1932" xlink:to="loc_us-gaap_AssetAcquisitionTable_01a01bb4-021d-79ce-bff0-f9d55ff4d5e6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_01a01bb4-021d-7cbe-b8ca-bb5ec242563a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AssetAcquisitionTable_01a01bb4-021d-79ce-bff0-f9d55ff4d5e6" xlink:to="loc_us-gaap_AssetAcquisitionAxis_01a01bb4-021d-7cbe-b8ca-bb5ec242563a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7cbe-b8ca-bb5ec242563a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AssetAcquisitionAxis_01a01bb4-021d-7cbe-b8ca-bb5ec242563a" xlink:to="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7cbe-b8ca-bb5ec242563a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7e92-99c6-a0113d1ab1f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AssetAcquisitionAxis_01a01bb4-021d-7cbe-b8ca-bb5ec242563a" xlink:to="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7e92-99c6-a0113d1ab1f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WhitetailWindEnergyGeneratingFacilityMember_01a01bb4-021d-7f7e-8e2c-541db6195a1d" xlink:href="wep-20260930.xsd#wep_WhitetailWindEnergyGeneratingFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_01a01bb4-021d-7e92-99c6-a0113d1ab1f6" xlink:to="loc_wep_WhitetailWindEnergyGeneratingFacilityMember_01a01bb4-021d-7f7e-8e2c-541db6195a1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_01a17a7b-a655-7e3d-83db-0546f4604b2c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AssetAcquisitionTable_01a01bb4-021d-79ce-bff0-f9d55ff4d5e6" xlink:to="loc_dei_LegalEntityAxis_01a17a7b-a655-7e3d-83db-0546f4604b2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a17a7b-a655-7e3d-83db-0546f4604b2c_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_01a17a7b-a655-7e3d-83db-0546f4604b2c" xlink:to="loc_dei_EntityDomain_01a17a7b-a655-7e3d-83db-0546f4604b2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a17a7c-91ca-79a1-8c0a-7d4baaacd0b9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_01a17a7b-a655-7e3d-83db-0546f4604b2c" xlink:to="loc_dei_EntityDomain_01a17a7c-91ca-79a1-8c0a-7d4baaacd0b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WisconsinElectricPowerCompanyMember_01a17a7e-4a22-7c40-a83a-87f6b59a5b0b" xlink:href="wep-20260930.xsd#wep_WisconsinElectricPowerCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_01a17a7c-91ca-79a1-8c0a-7d4baaacd0b9" xlink:to="loc_wep_WisconsinElectricPowerCompanyMember_01a17a7e-4a22-7c40-a83a-87f6b59a5b0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CapacityOfGenerationUnit_01a01bb4-021d-72fd-b6ec-592c4a5f0585" xlink:href="wep-20260930.xsd#wep_CapacityOfGenerationUnit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7389-a81d-04a36fcf1932" xlink:to="loc_wep_CapacityOfGenerationUnit_01a01bb4-021d-72fd-b6ec-592c4a5f0585" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_01a01bb4-021d-716d-9e5a-4f690bff1e50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7389-a81d-04a36fcf1932" xlink:to="loc_us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare_01a01bb4-021d-716d-9e5a-4f690bff1e50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionPriceOfAcquisitionExpected_01a01bb4-021d-7158-9191-96dac78380b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionPriceOfAcquisitionExpected"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_01a01bb4-021d-7389-a81d-04a36fcf1932" xlink:to="loc_us-gaap_AssetAcquisitionPriceOfAcquisitionExpected_01a01bb4-021d-7158-9191-96dac78380b5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/OPERATINGREVENUESDISAGGREGATIONOFOPERATINGREVENUESFORUTILITYSEGMENTDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#OPERATINGREVENUESDISAGGREGATIONOFOPERATINGREVENUESFORUTILITYSEGMENTDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/OPERATINGREVENUESDISAGGREGATIONOFOPERATINGREVENUESFORUTILITYSEGMENTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7b5b-81cd-1915567b7c52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7d2d-acdf-75c393e979e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7b5b-81cd-1915567b7c52" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7d2d-acdf-75c393e979e4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-7e59-bc30-66bd916a49d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7d2d-acdf-75c393e979e4" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-7e59-bc30-66bd916a49d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-7e59-bc30-66bd916a49d0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-7e59-bc30-66bd916a49d0" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-7e59-bc30-66bd916a49d0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-76dc-b6d7-427396f0a251" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-7e59-bc30-66bd916a49d0" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-76dc-b6d7-427396f0a251" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UtilitySegmentMember_01a01bb4-021d-7cc6-9c0f-5b1234cd7990" xlink:href="wep-20260930.xsd#wep_UtilitySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-021d-76dc-b6d7-427396f0a251" xlink:to="loc_wep_UtilitySegmentMember_01a01bb4-021d-7cc6-9c0f-5b1234cd7990" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7cd9-bebd-ce12f9356493" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7d2d-acdf-75c393e979e4" xlink:to="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7cd9-bebd-ce12f9356493" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7cd9-bebd-ce12f9356493_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7cd9-bebd-ce12f9356493" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7cd9-bebd-ce12f9356493_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7a34-a22b-4bcc528423f6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7cd9-bebd-ce12f9356493" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7a34-a22b-4bcc528423f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-021d-7da0-b7df-619a5f5a795e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ElectricityUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7a34-a22b-4bcc528423f6" xlink:to="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-021d-7da0-b7df-619a5f5a795e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-021d-766b-a55d-9a9aba7d4d03" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NaturalGasUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7a34-a22b-4bcc528423f6" xlink:to="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-021d-766b-a55d-9a9aba7d4d03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7450-90bf-18b37e08dd7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7d2d-acdf-75c393e979e4" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7450-90bf-18b37e08dd7e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7450-90bf-18b37e08dd7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7450-90bf-18b37e08dd7e" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7450-90bf-18b37e08dd7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-778b-b355-5f7d9171cf1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7450-90bf-18b37e08dd7e" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-778b-b355-5f7d9171cf1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_01a01bb4-021d-78a5-9e0d-618e28c76df9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-778b-b355-5f7d9171cf1b" xlink:to="loc_us-gaap_TransferredOverTimeMember_01a01bb4-021d-78a5-9e0d-618e28c76df9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-79ca-8abc-155ba1c8503b" xlink:href="wep-20260930.xsd#wep_TypesofOperatingRevenuesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7d2d-acdf-75c393e979e4" xlink:to="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-79ca-8abc-155ba1c8503b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-79ca-8abc-155ba1c8503b_default" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-79ca-8abc-155ba1c8503b" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-79ca-8abc-155ba1c8503b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7a7f-a967-ad522c6c6988" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-79ca-8abc-155ba1c8503b" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7a7f-a967-ad522c6c6988" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_01a01bb4-021d-727f-9071-ffc57bad14f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7a7f-a967-ad522c6c6988" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_01a01bb4-021d-727f-9071-ffc57bad14f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_OtheroperatingrevenuesMember_01a01bb4-021d-7298-aa27-1051c5fa2c98" xlink:href="wep-20260930.xsd#wep_OtheroperatingrevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7a7f-a967-ad522c6c6988" xlink:to="loc_wep_OtheroperatingrevenuesMember_01a01bb4-021d-7298-aa27-1051c5fa2c98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a01bb4-021d-729f-8ec8-95d3e583b2bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7b5b-81cd-1915567b7c52" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a01bb4-021d-729f-8ec8-95d3e583b2bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomer_01a01bb4-021d-7a8f-b630-876fc3d3bc3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueNotFromContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7b5b-81cd-1915567b7c52" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomer_01a01bb4-021d-7a8f-b630-876fc3d3bc3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_01a01bb4-021d-71aa-a35a-8a5f97b03354" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7b5b-81cd-1915567b7c52" xlink:to="loc_us-gaap_Revenues_01a01bb4-021d-71aa-a35a-8a5f97b03354" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/OPERATINGREVENUESDISAGGREGATIONOFELECTRICUTILITYOPERATINGREVENUESBYCUSTOMERCLASSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#OPERATINGREVENUESDISAGGREGATIONOFELECTRICUTILITYOPERATINGREVENUESBYCUSTOMERCLASSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/OPERATINGREVENUESDISAGGREGATIONOFELECTRICUTILITYOPERATINGREVENUESBYCUSTOMERCLASSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-72d0-b321-52cba07b1705" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7f3a-ade3-21a1df6264e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-72d0-b321-52cba07b1705" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7f3a-ade3-21a1df6264e8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-73d2-af9f-61faa51af263" xlink:href="wep-20260930.xsd#wep_TypesofOperatingRevenuesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7f3a-ade3-21a1df6264e8" xlink:to="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-73d2-af9f-61faa51af263" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-73d2-af9f-61faa51af263_default" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-73d2-af9f-61faa51af263" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-73d2-af9f-61faa51af263_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-750f-b34c-a844e9e3e5fd" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-73d2-af9f-61faa51af263" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-750f-b34c-a844e9e3e5fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_01a01bb4-021d-794e-b66e-e4f573c693ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-750f-b34c-a844e9e3e5fd" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_01a01bb4-021d-794e-b66e-e4f573c693ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-760f-a78c-ae1e3324747a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7f3a-ade3-21a1df6264e8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-760f-a78c-ae1e3324747a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-760f-a78c-ae1e3324747a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-760f-a78c-ae1e3324747a" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-760f-a78c-ae1e3324747a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-7551-8fee-f34c901eb81e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-760f-a78c-ae1e3324747a" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-7551-8fee-f34c901eb81e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UtilitySegmentMember_01a01bb4-021d-794c-85d9-0ce79ace8ec1" xlink:href="wep-20260930.xsd#wep_UtilitySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-021d-7551-8fee-f34c901eb81e" xlink:to="loc_wep_UtilitySegmentMember_01a01bb4-021d-794c-85d9-0ce79ace8ec1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7285-b21c-ef3a062deb87" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7f3a-ade3-21a1df6264e8" xlink:to="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7285-b21c-ef3a062deb87" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7285-b21c-ef3a062deb87_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7285-b21c-ef3a062deb87" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7285-b21c-ef3a062deb87_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7d2a-bc57-d312fa4b3b39" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-7285-b21c-ef3a062deb87" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7d2a-bc57-d312fa4b3b39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-021d-7a6a-b4a4-73c19a45c4ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ElectricityUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-7d2a-bc57-d312fa4b3b39" xlink:to="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-021d-7a6a-b4a4-73c19a45c4ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7b5e-a878-0bd0a9a3df9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7f3a-ade3-21a1df6264e8" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7b5e-a878-0bd0a9a3df9b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7b5e-a878-0bd0a9a3df9b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7b5e-a878-0bd0a9a3df9b" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7b5e-a878-0bd0a9a3df9b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7775-b50a-8fda8344f8a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7b5e-a878-0bd0a9a3df9b" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7775-b50a-8fda8344f8a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_01a01bb4-021d-7285-abe8-55095902ad51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7775-b50a-8fda8344f8a9" xlink:to="loc_us-gaap_TransferredOverTimeMember_01a01bb4-021d-7285-abe8-55095902ad51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_01a01bb4-021d-7669-b478-0b8393bfaf8d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-7f3a-ade3-21a1df6264e8" xlink:to="loc_srt_MajorCustomersAxis_01a01bb4-021d-7669-b478-0b8393bfaf8d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-7669-b478-0b8393bfaf8d_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_01a01bb4-021d-7669-b478-0b8393bfaf8d" xlink:to="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-7669-b478-0b8393bfaf8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-758b-be5a-469b5df68704" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_01a01bb4-021d-7669-b478-0b8393bfaf8d" xlink:to="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-758b-be5a-469b5df68704" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-7716-9521-18dd2249f7d4" xlink:href="wep-20260930.xsd#wep_TotalRetailCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-758b-be5a-469b5df68704" xlink:to="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-7716-9521-18dd2249f7d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_ResidentialcustomerMember_01a01bb4-021d-7a1b-9aeb-62e3e3a5f565" xlink:href="wep-20260930.xsd#wep_ResidentialcustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-7716-9521-18dd2249f7d4" xlink:to="loc_wep_ResidentialcustomerMember_01a01bb4-021d-7a1b-9aeb-62e3e3a5f565" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_SmallcommercialandindustrialMember_01a01bb4-021d-769a-90e6-e16872d6bf32" xlink:href="wep-20260930.xsd#wep_SmallcommercialandindustrialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-7716-9521-18dd2249f7d4" xlink:to="loc_wep_SmallcommercialandindustrialMember_01a01bb4-021d-769a-90e6-e16872d6bf32" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_LargecommercialandindustrialcustomersMember_01a01bb4-021d-70f4-9eec-5f9719116e4f" xlink:href="wep-20260930.xsd#wep_LargecommercialandindustrialcustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-7716-9521-18dd2249f7d4" xlink:to="loc_wep_LargecommercialandindustrialcustomersMember_01a01bb4-021d-70f4-9eec-5f9719116e4f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_OtherretailcustomerMember_01a01bb4-021d-763d-9d72-e3f08cba9454" xlink:href="wep-20260930.xsd#wep_OtherretailcustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-7716-9521-18dd2249f7d4" xlink:to="loc_wep_OtherretailcustomerMember_01a01bb4-021d-763d-9d72-e3f08cba9454" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WholesalecustomerMember_01a01bb4-021d-7e82-b330-fb368e6a797b" xlink:href="wep-20260930.xsd#wep_WholesalecustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-758b-be5a-469b5df68704" xlink:to="loc_wep_WholesalecustomerMember_01a01bb4-021d-7e82-b330-fb368e6a797b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_ResaleCustomersMember_01a01bb4-021d-7cc4-95e1-d9840d06516d" xlink:href="wep-20260930.xsd#wep_ResaleCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-758b-be5a-469b5df68704" xlink:to="loc_wep_ResaleCustomersMember_01a01bb4-021d-7cc4-95e1-d9840d06516d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_DowntownMilwaukeeSteamCustomersMember_01a01bb4-021d-78ee-9d52-f1123a8583a4" xlink:href="wep-20260930.xsd#wep_DowntownMilwaukeeSteamCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-758b-be5a-469b5df68704" xlink:to="loc_wep_DowntownMilwaukeeSteamCustomersMember_01a01bb4-021d-78ee-9d52-f1123a8583a4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_OtherutilityMember_01a01bb4-021d-7f38-93ee-a47c75933d8a" xlink:href="wep-20260930.xsd#wep_OtherutilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-758b-be5a-469b5df68704" xlink:to="loc_wep_OtherutilityMember_01a01bb4-021d-7f38-93ee-a47c75933d8a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a01bb4-021d-7ae5-8cf9-a3d3f3562cf9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-72d0-b321-52cba07b1705" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a01bb4-021d-7ae5-8cf9-a3d3f3562cf9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/OPERATINGREVENUESDISAGGREGATIONOFNATURALGASUTILITYOPERATINGREVENUESBYCUSTOMERCLASSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#OPERATINGREVENUESDISAGGREGATIONOFNATURALGASUTILITYOPERATINGREVENUESBYCUSTOMERCLASSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/OPERATINGREVENUESDISAGGREGATIONOFNATURALGASUTILITYOPERATINGREVENUESBYCUSTOMERCLASSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7fdd-b28d-13876a5aefe1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-71aa-82e6-857a2acc1b89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7fdd-b28d-13876a5aefe1" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-71aa-82e6-857a2acc1b89" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-792b-9c71-5989baa1a21a" xlink:href="wep-20260930.xsd#wep_TypesofOperatingRevenuesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-71aa-82e6-857a2acc1b89" xlink:to="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-792b-9c71-5989baa1a21a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-792b-9c71-5989baa1a21a_default" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-792b-9c71-5989baa1a21a" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-792b-9c71-5989baa1a21a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7ec1-b587-7bf1ffa59719" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-792b-9c71-5989baa1a21a" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7ec1-b587-7bf1ffa59719" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_01a01bb4-021d-70ce-ae7e-10956d875445" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7ec1-b587-7bf1ffa59719" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_01a01bb4-021d-70ce-ae7e-10956d875445" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-7374-94cf-5536bfb97e1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-71aa-82e6-857a2acc1b89" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-7374-94cf-5536bfb97e1a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-7374-94cf-5536bfb97e1a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-7374-94cf-5536bfb97e1a" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-7374-94cf-5536bfb97e1a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-777a-ac34-8b4a8c56d132" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-7374-94cf-5536bfb97e1a" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-777a-ac34-8b4a8c56d132" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UtilitySegmentMember_01a01bb4-021d-7ba2-91a9-4ed573efcd5b" xlink:href="wep-20260930.xsd#wep_UtilitySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-021d-777a-ac34-8b4a8c56d132" xlink:to="loc_wep_UtilitySegmentMember_01a01bb4-021d-7ba2-91a9-4ed573efcd5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a01bb4-021d-78a2-9229-c1f6f3265832" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-71aa-82e6-857a2acc1b89" xlink:to="loc_srt_ProductOrServiceAxis_01a01bb4-021d-78a2-9229-c1f6f3265832" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-78a2-9229-c1f6f3265832_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-78a2-9229-c1f6f3265832" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-78a2-9229-c1f6f3265832_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-741f-87fc-b9853177db53" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-021d-78a2-9229-c1f6f3265832" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-741f-87fc-b9853177db53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-021d-73c0-8645-b60a1ac9acd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NaturalGasUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-021d-741f-87fc-b9853177db53" xlink:to="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-021d-73c0-8645-b60a1ac9acd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7f2d-807e-d6c0ff077a7f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-71aa-82e6-857a2acc1b89" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7f2d-807e-d6c0ff077a7f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7f2d-807e-d6c0ff077a7f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7f2d-807e-d6c0ff077a7f" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7f2d-807e-d6c0ff077a7f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7d88-932d-4db4527cd7f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_01a01bb4-021d-7f2d-807e-d6c0ff077a7f" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7d88-932d-4db4527cd7f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_01a01bb4-021d-763f-ae38-8afe06c05597" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_01a01bb4-021d-7d88-932d-4db4527cd7f5" xlink:to="loc_us-gaap_TransferredOverTimeMember_01a01bb4-021d-763f-ae38-8afe06c05597" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_01a01bb4-021d-7956-9e68-e3550dc5ba28" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-71aa-82e6-857a2acc1b89" xlink:to="loc_srt_MajorCustomersAxis_01a01bb4-021d-7956-9e68-e3550dc5ba28" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-7956-9e68-e3550dc5ba28_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_01a01bb4-021d-7956-9e68-e3550dc5ba28" xlink:to="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-7956-9e68-e3550dc5ba28_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-74d2-82c7-1e897c42bf3c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_01a01bb4-021d-7956-9e68-e3550dc5ba28" xlink:to="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-74d2-82c7-1e897c42bf3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-768f-ad46-a3946bc6ff95" xlink:href="wep-20260930.xsd#wep_TotalRetailCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-74d2-82c7-1e897c42bf3c" xlink:to="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-768f-ad46-a3946bc6ff95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_ResidentialcustomerMember_01a01bb4-021d-7ed4-9d22-ab15ac1e0eef" xlink:href="wep-20260930.xsd#wep_ResidentialcustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-768f-ad46-a3946bc6ff95" xlink:to="loc_wep_ResidentialcustomerMember_01a01bb4-021d-7ed4-9d22-ab15ac1e0eef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CommercialandIndustrialCustomerMember_01a01bb4-021d-7cfb-a0a8-25158e61a9bb" xlink:href="wep-20260930.xsd#wep_CommercialandIndustrialCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TotalRetailCustomersMember_01a01bb4-021d-768f-ad46-a3946bc6ff95" xlink:to="loc_wep_CommercialandIndustrialCustomerMember_01a01bb4-021d-7cfb-a0a8-25158e61a9bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TransportationcustomersMember_01a01bb4-021d-71d8-bb50-bf3c66feaad5" xlink:href="wep-20260930.xsd#wep_TransportationcustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-74d2-82c7-1e897c42bf3c" xlink:to="loc_wep_TransportationcustomersMember_01a01bb4-021d-71d8-bb50-bf3c66feaad5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_OtherutilityMember_01a01bb4-021d-7879-b541-8af7acc97868" xlink:href="wep-20260930.xsd#wep_OtherutilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_01a01bb4-021d-74d2-82c7-1e897c42bf3c" xlink:to="loc_wep_OtherutilityMember_01a01bb4-021d-7879-b541-8af7acc97868" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a01bb4-021d-724b-a7de-64f5a9aaf044" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7fdd-b28d-13876a5aefe1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_01a01bb4-021d-724b-a7de-64f5a9aaf044" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/OPERATINGREVENUESOTHEROPERATINGREVENUESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#OPERATINGREVENUESOTHEROPERATINGREVENUESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/OPERATINGREVENUESOTHEROPERATINGREVENUESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7eac-a157-6da67bdd101a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-79d5-b6f2-4b077458e743" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7eac-a157-6da67bdd101a" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-79d5-b6f2-4b077458e743" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-73dc-ad7b-3702f2be995b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-79d5-b6f2-4b077458e743" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-73dc-ad7b-3702f2be995b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-73dc-ad7b-3702f2be995b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-73dc-ad7b-3702f2be995b" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-73dc-ad7b-3702f2be995b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021d-7840-b1cd-f0bc0c715306" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021d-73dc-ad7b-3702f2be995b" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021d-7840-b1cd-f0bc0c715306" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UtilitySegmentMember_01a01bb4-021d-7f8c-8325-a33478e3f279" xlink:href="wep-20260930.xsd#wep_UtilitySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-021d-7840-b1cd-f0bc0c715306" xlink:to="loc_wep_UtilitySegmentMember_01a01bb4-021d-7f8c-8325-a33478e3f279" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-7d4a-85bf-0f9b0e877285" xlink:href="wep-20260930.xsd#wep_TypesofOperatingRevenuesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-79d5-b6f2-4b077458e743" xlink:to="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-7d4a-85bf-0f9b0e877285" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7d4a-85bf-0f9b0e877285_default" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-7d4a-85bf-0f9b0e877285" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-7d4a-85bf-0f9b0e877285_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-789d-bd3e-5b1b51824a2f" xlink:href="wep-20260930.xsd#wep_TypesOfOperatingRevenueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_wep_TypesofOperatingRevenuesAxis_01a01bb4-021d-7d4a-85bf-0f9b0e877285" xlink:to="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-789d-bd3e-5b1b51824a2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_OtheroperatingrevenuesMember_01a01bb4-021d-73c0-97a0-37caf571a853" xlink:href="wep-20260930.xsd#wep_OtheroperatingrevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesOfOperatingRevenueDomain_01a01bb4-021d-789d-bd3e-5b1b51824a2f" xlink:to="loc_wep_OtheroperatingrevenuesMember_01a01bb4-021d-73c0-97a0-37caf571a853" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesofOtherOperatingRevenuesAxis_01a01bb4-021d-7e4e-8b93-9647c7619d68" xlink:href="wep-20260930.xsd#wep_TypesofOtherOperatingRevenuesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_01a01bb4-021d-79d5-b6f2-4b077458e743" xlink:to="loc_wep_TypesofOtherOperatingRevenuesAxis_01a01bb4-021d-7e4e-8b93-9647c7619d68" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesofOtherOperatingRevenuesDomain_01a01bb4-021d-7e4e-8b93-9647c7619d68_default" xlink:href="wep-20260930.xsd#wep_TypesofOtherOperatingRevenuesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_wep_TypesofOtherOperatingRevenuesAxis_01a01bb4-021d-7e4e-8b93-9647c7619d68" xlink:to="loc_wep_TypesofOtherOperatingRevenuesDomain_01a01bb4-021d-7e4e-8b93-9647c7619d68_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TypesofOtherOperatingRevenuesDomain_01a01bb4-021d-7ec3-98c5-6db6049710fd" xlink:href="wep-20260930.xsd#wep_TypesofOtherOperatingRevenuesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_wep_TypesofOtherOperatingRevenuesAxis_01a01bb4-021d-7e4e-8b93-9647c7619d68" xlink:to="loc_wep_TypesofOtherOperatingRevenuesDomain_01a01bb4-021d-7ec3-98c5-6db6049710fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_BepokeResourcesCurrentReturnMember_01a01bb4-021d-759b-8e38-cff50fef3234" xlink:href="wep-20260930.xsd#wep_BepokeResourcesCurrentReturnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesofOtherOperatingRevenuesDomain_01a01bb4-021d-7ec3-98c5-6db6049710fd" xlink:to="loc_wep_BepokeResourcesCurrentReturnMember_01a01bb4-021d-759b-8e38-cff50fef3234" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_LatepaymentchargesMember_01a01bb4-021d-7560-ae53-b176d9e66dbe" xlink:href="wep-20260930.xsd#wep_LatepaymentchargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesofOtherOperatingRevenuesDomain_01a01bb4-021d-7ec3-98c5-6db6049710fd" xlink:to="loc_wep_LatepaymentchargesMember_01a01bb4-021d-7560-ae53-b176d9e66dbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_LeasesMember_01a01bb4-021d-79cf-991c-7924c21c7655" xlink:href="wep-20260930.xsd#wep_LeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesofOtherOperatingRevenuesDomain_01a01bb4-021d-7ec3-98c5-6db6049710fd" xlink:to="loc_wep_LeasesMember_01a01bb4-021d-79cf-991c-7924c21c7655" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_AlternativerevenuesutilityMember_01a01bb4-021d-7ef5-8b04-539ba8b9991a" xlink:href="wep-20260930.xsd#wep_AlternativerevenuesutilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_TypesofOtherOperatingRevenuesDomain_01a01bb4-021d-7ec3-98c5-6db6049710fd" xlink:to="loc_wep_AlternativerevenuesutilityMember_01a01bb4-021d-7ef5-8b04-539ba8b9991a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomer_01a01bb4-021e-79ec-a531-b021e9ff3ae6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueNotFromContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_01a01bb4-021d-7eac-a157-6da67bdd101a" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomer_01a01bb4-021e-79ec-a531-b021e9ff3ae6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/CREDITLOSSESGROSSRECEIVABLESANDRELATEDALLOWANCESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#CREDITLOSSESGROSSRECEIVABLESANDRELATEDALLOWANCESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/CREDITLOSSESGROSSRECEIVABLESANDRELATEDALLOWANCESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_01a01bb4-021e-7df5-a0d9-d0a572a20f94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_01a01bb4-021e-7df5-a0d9-d0a572a20f94" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021e-76fd-9c99-1abc57f5f09c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_01a01bb4-021e-7df5-a0d9-d0a572a20f94" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021e-76fd-9c99-1abc57f5f09c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021e-76fd-9c99-1abc57f5f09c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021e-76fd-9c99-1abc57f5f09c" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021e-76fd-9c99-1abc57f5f09c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021e-79a1-8952-6d2f3aa3b0cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021e-76fd-9c99-1abc57f5f09c" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021e-79a1-8952-6d2f3aa3b0cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UtilitySegmentMember_01a01bb4-021e-772e-b2c8-012a2b412a9a" xlink:href="wep-20260930.xsd#wep_UtilitySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-021e-79a1-8952-6d2f3aa3b0cc" xlink:to="loc_wep_UtilitySegmentMember_01a01bb4-021e-772e-b2c8-012a2b412a9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_01a01bb4-021e-705d-ac19-7efd2b27310e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-021e-79a1-8952-6d2f3aa3b0cc" xlink:to="loc_us-gaap_AllOtherSegmentsMember_01a01bb4-021e-705d-ac19-7efd2b27310e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGross_01a01bb4-021e-74c6-a376-29387a29e9e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:to="loc_us-gaap_AccountsReceivableGross_01a01bb4-021e-74c6-a376-29387a29e9e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_01a01bb4-021e-72d9-bd78-7bebaac6c0ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_01a01bb4-021e-72d9-bd78-7bebaac6c0ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_01a01bb4-021e-7f1a-95df-b3eeb9589353" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:to="loc_us-gaap_AccountsReceivableNet_01a01bb4-021e-7f1a-95df-b3eeb9589353" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_AccountsReceivablePastDueGreaterthan90Days_01a01bb4-021e-7753-881f-c086ac3c7363" xlink:href="wep-20260930.xsd#wep_AccountsReceivablePastDueGreaterthan90Days"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:to="loc_wep_AccountsReceivablePastDueGreaterthan90Days_01a01bb4-021e-7753-881f-c086ac3c7363" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_Percentofaccountsreceivablepastduegreaterthan90dayswithregulatorymechanismstocollect_01a01bb4-021e-7971-8767-9a7ee788654a" xlink:href="wep-20260930.xsd#wep_Percentofaccountsreceivablepastduegreaterthan90dayswithregulatorymechanismstocollect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:to="loc_wep_Percentofaccountsreceivablepastduegreaterthan90dayswithregulatorymechanismstocollect_01a01bb4-021e-7971-8767-9a7ee788654a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_Amountofnetaccountsreceivablewithregulatoryprotections_01a01bb4-021e-7e4e-89ac-ab048c4dcffe" xlink:href="wep-20260930.xsd#wep_Amountofnetaccountsreceivablewithregulatoryprotections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:to="loc_wep_Amountofnetaccountsreceivablewithregulatoryprotections_01a01bb4-021e-7e4e-89ac-ab048c4dcffe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_Percentofnetaccountsreceivablewithregulatoryprotections_01a01bb4-021e-7035-ac53-04fefc4c374c" xlink:href="wep-20260930.xsd#wep_Percentofnetaccountsreceivablewithregulatoryprotections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-732f-9e0d-4551dbfb04ff" xlink:to="loc_wep_Percentofnetaccountsreceivablewithregulatoryprotections_01a01bb4-021e-7035-ac53-04fefc4c374c" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/CREDITLOSSESROLLFORWARDOFALLOWANCESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#CREDITLOSSESROLLFORWARDOFALLOWANCESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/CREDITLOSSESROLLFORWARDOFALLOWANCESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-7b9a-996e-fee5dd24d51d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_01a01bb4-021e-7fa8-ae7e-d4ddf3cb6ebe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-7b9a-996e-fee5dd24d51d" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_01a01bb4-021e-7fa8-ae7e-d4ddf3cb6ebe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021e-7c27-8bff-efdbb986e4d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_01a01bb4-021e-7fa8-ae7e-d4ddf3cb6ebe" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021e-7c27-8bff-efdbb986e4d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021e-7c27-8bff-efdbb986e4d8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021e-7c27-8bff-efdbb986e4d8" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021e-7c27-8bff-efdbb986e4d8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-021e-730b-a6de-7307d9e932f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-021e-7c27-8bff-efdbb986e4d8" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-021e-730b-a6de-7307d9e932f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UtilitySegmentMember_01a01bb4-021e-718b-8a7b-98f4c689a110" xlink:href="wep-20260930.xsd#wep_UtilitySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-021e-730b-a6de-7307d9e932f7" xlink:to="loc_wep_UtilitySegmentMember_01a01bb4-021e-718b-8a7b-98f4c689a110" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-021e-73b8-94a0-b7404568a826" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_01a01bb4-021e-7fa8-ae7e-d4ddf3cb6ebe" xlink:to="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-021e-73b8-94a0-b7404568a826" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-73b8-94a0-b7404568a826_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-021e-73b8-94a0-b7404568a826" xlink:to="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-73b8-94a0-b7404568a826_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-79b6-bf33-be14d859587e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-021e-73b8-94a0-b7404568a826" xlink:to="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-79b6-bf33-be14d859587e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UncollectibleExpenseMember_01a01bb4-021e-7477-9ad5-274781e39c20" xlink:href="wep-20260930.xsd#wep_UncollectibleExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-79b6-bf33-be14d859587e" xlink:to="loc_wep_UncollectibleExpenseMember_01a01bb4-021e-7477-9ad5-274781e39c20" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_01a01bb4-021e-79a7-a971-da4ae8c52ee3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_01a01bb4-021e-7b9a-996e-fee5dd24d51d" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_01a01bb4-021e-79a7-a971-da4ae8c52ee3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_01a01bb4-021e-7bfa-be8f-eb88993e80fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_01a01bb4-021e-79a7-a971-da4ae8c52ee3" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_01a01bb4-021e-7bfa-be8f-eb88993e80fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_01a01bb4-021e-78e1-925a-cc6018444634" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_01a01bb4-021e-79a7-a971-da4ae8c52ee3" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_01a01bb4-021e-78e1-925a-cc6018444634" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities_01a01bb4-021e-7099-bcbe-cc73a5cf8cef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_01a01bb4-021e-79a7-a971-da4ae8c52ee3" xlink:to="loc_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities_01a01bb4-021e-7099-bcbe-cc73a5cf8cef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_01a01bb4-021e-7ff1-8896-f3835b91352e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_01a01bb4-021e-79a7-a971-da4ae8c52ee3" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_01a01bb4-021e-7ff1-8896-f3835b91352e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_01a01bb4-021e-76cd-9877-ed354ab6a428" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_01a01bb4-021e-79a7-a971-da4ae8c52ee3" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_01a01bb4-021e-76cd-9877-ed354ab6a428" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_01a01bb4-021e-7295-89dc-aea83613df36" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease_01a01bb4-021e-725e-a0cf-c6533c56b7e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_01a01bb4-021e-79a7-a971-da4ae8c52ee3" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease_01a01bb4-021e-725e-a0cf-c6533c56b7e3" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/REGULATORYASSETSANDLIABILITIESREGULATORYASSETSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#REGULATORYASSETSANDLIABILITIESREGULATORYASSETSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/REGULATORYASSETSANDLIABILITIESREGULATORYASSETSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetLineItems_01a01bb4-021e-70a8-8eef-1f41d00888ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_01a01bb4-021e-734a-8a81-6f0cdb342745" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRegulatoryAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_01a01bb4-021e-70a8-8eef-1f41d00888ec" xlink:to="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_01a01bb4-021e-734a-8a81-6f0cdb342745" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-021e-7dd2-ae69-776eb05ed46b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRegulatoryAssetsTable_01a01bb4-021e-734a-8a81-6f0cdb342745" xlink:to="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-021e-7dd2-ae69-776eb05ed46b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-7dd2-ae69-776eb05ed46b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-021e-7dd2-ae69-776eb05ed46b" xlink:to="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-7dd2-ae69-776eb05ed46b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-021e-7dd2-ae69-776eb05ed46b" xlink:to="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WePowerFinanceLeasesMember_01a01bb4-021e-7619-a4f2-1d6e37365cc7" xlink:href="wep-20260930.xsd#wep_WePowerFinanceLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_wep_WePowerFinanceLeasesMember_01a01bb4-021e-7619-a4f2-1d6e37365cc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StrandedCostsMember_01a01bb4-021e-73e0-a735-08f6b31f9866" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StrandedCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_us-gaap_StrandedCostsMember_01a01bb4-021e-73e0-a735-08f6b31f9866" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxChargesMember_01a01bb4-021e-7da7-9aec-e8578d7b1401" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxChargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_us-gaap_DeferredIncomeTaxChargesMember_01a01bb4-021e-7da7-9aec-e8578d7b1401" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementPlansCostsMember_01a01bb4-021e-7ff4-b152-b353a3e9b0d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionAndOtherPostretirementPlansCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_us-gaap_PensionAndOtherPostretirementPlansCostsMember_01a01bb4-021e-7ff4-b152-b353a3e9b0d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_SystemSupportResourceMember_01a01bb4-021e-73a8-b8ae-8aba240f60ed" xlink:href="wep-20260930.xsd#wep_SystemSupportResourceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_wep_SystemSupportResourceMember_01a01bb4-021e-73a8-b8ae-8aba240f60ed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_ElectricTransmissionCostsMember_01a01bb4-021e-71fa-bc36-e6ae74bf498b" xlink:href="wep-20260930.xsd#wep_ElectricTransmissionCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_wep_ElectricTransmissionCostsMember_01a01bb4-021e-71fa-bc36-e6ae74bf498b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationCostsMember_01a01bb4-021e-7d90-bc74-4ce5601f754e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_us-gaap_AssetRetirementObligationCostsMember_01a01bb4-021e-7d90-bc74-4ce5601f754e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_SecuritizationCostsMember_01a01bb4-021e-7948-bb53-b603184b4d82" xlink:href="wep-20260930.xsd#wep_SecuritizationCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_wep_SecuritizationCostsMember_01a01bb4-021e-7948-bb53-b603184b4d82" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UncollectibleExpenseMember_01a01bb4-021e-7e1a-8bf5-a5a83c66b258" xlink:href="wep-20260930.xsd#wep_UncollectibleExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_wep_UncollectibleExpenseMember_01a01bb4-021e-7e1a-8bf5-a5a83c66b258" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_OtherFinanceAndOperatingLeasesMember_01a01bb4-021e-76b7-afe5-96dd82e33978" xlink:href="wep-20260930.xsd#wep_OtherFinanceAndOperatingLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_wep_OtherFinanceAndOperatingLeasesMember_01a01bb4-021e-76b7-afe5-96dd82e33978" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredDerivativeGainLossMember_01a01bb4-021e-7dfe-890a-425b389d69c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredDerivativeGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_us-gaap_DeferredDerivativeGainLossMember_01a01bb4-021e-7dfe-890a-425b389d69c6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_RevenueRequirementsGenerationFacilitiesMember_01a179ca-74b9-7b56-aacb-3ae3c2051a13" xlink:href="wep-20260930.xsd#wep_RevenueRequirementsGenerationFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_wep_RevenueRequirementsGenerationFacilitiesMember_01a179ca-74b9-7b56-aacb-3ae3c2051a13" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_BluewaterMember_01a01bb4-021e-7ed0-ac47-01ef1ba48c9b" xlink:href="wep-20260930.xsd#wep_BluewaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_wep_BluewaterMember_01a01bb4-021e-7ed0-ac47-01ef1ba48c9b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_01a01bb4-021e-7202-871a-672f833894c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherRegulatoryAssetsLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-021e-77dc-9eb6-8d5a981c40d3" xlink:to="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_01a01bb4-021e-7202-871a-672f833894c9" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssets_01a01bb4-021e-7c04-9561-a4b594eaf889" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetLineItems_01a01bb4-021e-70a8-8eef-1f41d00888ec" xlink:to="loc_us-gaap_RegulatoryAssets_01a01bb4-021e-7c04-9561-a4b594eaf889" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/REGULATORYASSETSANDLIABILITIESREGULATORYLIABILITIESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#REGULATORYASSETSANDLIABILITIESREGULATORYLIABILITIESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/REGULATORYASSETSANDLIABILITIESREGULATORYLIABILITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilitiesLineItems_01a01bb4-021e-7db2-b27b-643f518a776a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilitiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_01a01bb4-021e-7170-8c68-cf5cb531bf93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRegulatoryLiabilitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_01a01bb4-021e-7db2-b27b-643f518a776a" xlink:to="loc_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_01a01bb4-021e-7170-8c68-cf5cb531bf93" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-021e-7704-9e69-7f306a23e4e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRegulatoryLiabilitiesTable_01a01bb4-021e-7170-8c68-cf5cb531bf93" xlink:to="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-021e-7704-9e69-7f306a23e4e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7704-9e69-7f306a23e4e1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-021e-7704-9e69-7f306a23e4e1" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7704-9e69-7f306a23e4e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-021e-7704-9e69-7f306a23e4e1" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RemovalCostsMember_01a01bb4-021e-7477-9a49-2420365b4cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RemovalCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_us-gaap_RemovalCostsMember_01a01bb4-021e-7477-9a49-2420365b4cb4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxChargesMember_01a01bb4-021e-7e77-b74f-5f92c593182f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxChargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_us-gaap_DeferredIncomeTaxChargesMember_01a01bb4-021e-7e77-b74f-5f92c593182f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementPlansCostsMember_01a01bb4-021e-749d-a8a3-ecef0a63a9cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionAndOtherPostretirementPlansCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_us-gaap_PensionAndOtherPostretirementPlansCostsMember_01a01bb4-021e-749d-a8a3-ecef0a63a9cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_EnergyCostsRefundableThroughRateAdjustmentsMember_01a01bb4-021e-7e85-8bb9-05a8388fc7da" xlink:href="wep-20260930.xsd#wep_EnergyCostsRefundableThroughRateAdjustmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_wep_EnergyCostsRefundableThroughRateAdjustmentsMember_01a01bb4-021e-7e85-8bb9-05a8388fc7da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_EarningsSharingMechanismsMember_01a01bb4-021e-7a9f-ac14-0d2cc6d263d1" xlink:href="wep-20260930.xsd#wep_EarningsSharingMechanismsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_wep_EarningsSharingMechanismsMember_01a01bb4-021e-7a9f-ac14-0d2cc6d263d1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WePowerEscrowedCostsMember_01a01bb4-021e-7a1e-9968-00b997e0061f" xlink:href="wep-20260930.xsd#wep_WePowerEscrowedCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_wep_WePowerEscrowedCostsMember_01a01bb4-021e-7a1e-9968-00b997e0061f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_UncollectibleExpenseMember_01a179d3-d2f2-7838-9e8c-75ea9dc20f2d" xlink:href="wep-20260930.xsd#wep_UncollectibleExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_wep_UncollectibleExpenseMember_01a179d3-d2f2-7838-9e8c-75ea9dc20f2d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_VLCTransmissionServiceChargeMember_01a179d6-1931-7b45-a050-76339cd99d89" xlink:href="wep-20260930.xsd#wep_VLCTransmissionServiceChargeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_wep_VLCTransmissionServiceChargeMember_01a179d6-1931-7b45-a050-76339cd99d89" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_01a01bb4-021e-71b8-94c3-9b5f94a21c82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherRegulatoryAssetsLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-021e-7316-96dd-fcbcf623662f" xlink:to="loc_us-gaap_OtherRegulatoryAssetsLiabilitiesMember_01a01bb4-021e-71b8-94c3-9b5f94a21c82" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityCurrent_01a01bb4-021e-7e2a-8e8b-23392a3f0431" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_01a01bb4-021e-7db2-b27b-643f518a776a" xlink:to="loc_us-gaap_RegulatoryLiabilityCurrent_01a01bb4-021e-7e2a-8e8b-23392a3f0431" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_01a01bb4-021e-7158-b1d9-70ed52f5ed8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_01a01bb4-021e-7db2-b27b-643f518a776a" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_01a01bb4-021e-7158-b1d9-70ed52f5ed8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilities_01a01bb4-021e-7d96-9e87-bb4f4089666f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilitiesLineItems_01a01bb4-021e-7db2-b27b-643f518a776a" xlink:to="loc_us-gaap_RegulatoryLiabilities_01a01bb4-021e-7d96-9e87-bb4f4089666f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/PROPERTYPLANTANDEQUIPMENTDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#PROPERTYPLANTANDEQUIPMENTDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/PROPERTYPLANTANDEQUIPMENTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_01a01bb4-021e-7184-85b8-460d5972534d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_01a01bb4-021e-7f3c-ac7c-b29ecb5c458c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_01a01bb4-021e-7184-85b8-460d5972534d" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_01a01bb4-021e-7f3c-ac7c-b29ecb5c458c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_01a01bb4-021e-72b6-acd5-935ecf165db8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_01a01bb4-021e-7f3c-ac7c-b29ecb5c458c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_01a01bb4-021e-72b6-acd5-935ecf165db8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_01a01bb4-021e-72b6-acd5-935ecf165db8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_01a01bb4-021e-72b6-acd5-935ecf165db8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_01a01bb4-021e-72b6-acd5-935ecf165db8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_01a01bb4-021e-7c4d-aca5-baf52b01b213" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_01a01bb4-021e-72b6-acd5-935ecf165db8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_01a01bb4-021e-7c4d-aca5-baf52b01b213" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_OCPPMember_01a01bb4-021e-7382-a152-75662c942db6" xlink:href="wep-20260930.xsd#wep_OCPPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_01a01bb4-021e-7c4d-aca5-baf52b01b213" xlink:to="loc_wep_OCPPMember_01a01bb4-021e-7382-a152-75662c942db6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NumberOfFactorsTheDecisionToPostponeTheRetirementDateWasBasedOn_01a01bb4-021e-7f5d-aa36-dbb5628c1383" xlink:href="wep-20260930.xsd#wep_NumberOfFactorsTheDecisionToPostponeTheRetirementDateWasBasedOn"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_01a01bb4-021e-7184-85b8-460d5972534d" xlink:to="loc_wep_NumberOfFactorsTheDecisionToPostponeTheRetirementDateWasBasedOn_01a01bb4-021e-7f5d-aa36-dbb5628c1383" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_01a01bb4-021e-7fc6-99ac-eed8ab8b75fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_01a01bb4-021e-7184-85b8-460d5972534d" xlink:to="loc_us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_01a01bb4-021e-7fc6-99ac-eed8ab8b75fe" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/SHORTTERMDEBTANDLINESOFCREDITSHORTTERMBORROWINGSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#SHORTTERMDEBTANDLINESOFCREDITSHORTTERMBORROWINGSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/SHORTTERMDEBTANDLINESOFCREDITSHORTTERMBORROWINGSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_01a01bb4-021e-793a-8de2-565bb4d474cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_01a01bb4-021e-738e-8473-d0d112021a8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a01bb4-021e-793a-8de2-565bb4d474cc" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_01a01bb4-021e-738e-8473-d0d112021a8d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_01a01bb4-021e-7b7a-b660-7b12e917223e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_01a01bb4-021e-738e-8473-d0d112021a8d" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_01a01bb4-021e-7b7a-b660-7b12e917223e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-7b7a-b660-7b12e917223e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_01a01bb4-021e-7b7a-b660-7b12e917223e" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-7b7a-b660-7b12e917223e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-767f-89be-78c4575c8980" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_01a01bb4-021e-7b7a-b660-7b12e917223e" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-767f-89be-78c4575c8980" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_01a01bb4-021e-71ab-bbd3-5119125e258d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-767f-89be-78c4575c8980" xlink:to="loc_us-gaap_CommercialPaperMember_01a01bb4-021e-71ab-bbd3-5119125e258d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaper_01a01bb4-021e-7432-818b-dc36d2e28de5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaper"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a01bb4-021e-793a-8de2-565bb4d474cc" xlink:to="loc_us-gaap_CommercialPaper_01a01bb4-021e-7432-818b-dc36d2e28de5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtWeightedAverageInterestRate_01a01bb4-021e-70d0-93ff-88da56e167ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a01bb4-021e-793a-8de2-565bb4d474cc" xlink:to="loc_us-gaap_ShortTermDebtWeightedAverageInterestRate_01a01bb4-021e-70d0-93ff-88da56e167ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShorttermDebtAverageOutstandingAmount_01a01bb4-021e-7453-97ca-5e7cc1ac5e3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShorttermDebtAverageOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a01bb4-021e-793a-8de2-565bb4d474cc" xlink:to="loc_us-gaap_ShorttermDebtAverageOutstandingAmount_01a01bb4-021e-7453-97ca-5e7cc1ac5e3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtWeightedAverageInterestRateOverTime_01a01bb4-021e-7bec-bbce-0a2e27ace364" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtWeightedAverageInterestRateOverTime"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_01a01bb4-021e-793a-8de2-565bb4d474cc" xlink:to="loc_us-gaap_ShortTermDebtWeightedAverageInterestRateOverTime_01a01bb4-021e-7bec-bbce-0a2e27ace364" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/SHORTTERMDEBTANDLINESOFCREDITREVOLVINGCREDITFACILITIESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#SHORTTERMDEBTANDLINESOFCREDITREVOLVINGCREDITFACILITIESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/SHORTTERMDEBTANDLINESOFCREDITREVOLVINGCREDITFACILITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_01a01bb4-021e-73da-8483-7d0df0a9bcf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_01a01bb4-021e-7f88-8226-3f026ab6a95a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a01bb4-021e-73da-8483-7d0df0a9bcf8" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_01a01bb4-021e-7f88-8226-3f026ab6a95a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_01a01bb4-021e-75cb-84f4-13f9281cc882" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_01a01bb4-021e-7f88-8226-3f026ab6a95a" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_01a01bb4-021e-75cb-84f4-13f9281cc882" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-75cb-84f4-13f9281cc882_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_01a01bb4-021e-75cb-84f4-13f9281cc882" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-75cb-84f4-13f9281cc882_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-7d52-8d9a-aed5a768d657" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_01a01bb4-021e-75cb-84f4-13f9281cc882" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-7d52-8d9a-aed5a768d657" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_01a01bb4-021e-76ac-908c-3101ec3ff719" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-7d52-8d9a-aed5a768d657" xlink:to="loc_us-gaap_CommercialPaperMember_01a01bb4-021e-76ac-908c-3101ec3ff719" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_01a01bb4-021e-7504-a4ba-b4a944e8580c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_01a01bb4-021e-7d52-8d9a-aed5a768d657" xlink:to="loc_us-gaap_LetterOfCreditMember_01a01bb4-021e-7504-a4ba-b4a944e8580c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_01a01bb4-021e-7122-880f-20bb2654602b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_01a01bb4-021e-7f88-8226-3f026ab6a95a" xlink:to="loc_us-gaap_CreditFacilityAxis_01a01bb4-021e-7122-880f-20bb2654602b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_01a01bb4-021e-7122-880f-20bb2654602b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_01a01bb4-021e-7122-880f-20bb2654602b" xlink:to="loc_us-gaap_CreditFacilityDomain_01a01bb4-021e-7122-880f-20bb2654602b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_01a01bb4-021e-7147-a059-dc66fe9c90cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_01a01bb4-021e-7122-880f-20bb2654602b" xlink:to="loc_us-gaap_CreditFacilityDomain_01a01bb4-021e-7147-a059-dc66fe9c90cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_01a01bb4-021e-77d6-b020-ba3c44eb9951" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_01a01bb4-021e-7147-a059-dc66fe9c90cf" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_01a01bb4-021e-77d6-b020-ba3c44eb9951" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_01a01bb4-021e-7514-86c2-9bd1e9a2bacc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a01bb4-021e-73da-8483-7d0df0a9bcf8" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_01a01bb4-021e-7514-86c2-9bd1e9a2bacc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_01a01bb4-02b5-7e77-9b47-d6dd3f244888" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a01bb4-021e-73da-8483-7d0df0a9bcf8" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_01a01bb4-02b5-7e77-9b47-d6dd3f244888" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaper_01a01bb4-02b5-7102-bc19-6d0513c02ce3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaper"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a01bb4-021e-73da-8483-7d0df0a9bcf8" xlink:to="loc_us-gaap_CommercialPaper_01a01bb4-02b5-7102-bc19-6d0513c02ce3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_01a01bb4-02b5-79f7-9288-0c9ee5f2aa93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_01a01bb4-021e-73da-8483-7d0df0a9bcf8" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_01a01bb4-02b5-79f7-9288-0c9ee5f2aa93" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/LONGTERMDEBTDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#LONGTERMDEBTDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/LONGTERMDEBTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_01a01bb4-02b5-7c05-89ff-12574f03539a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_01a01bb4-02b5-78ad-ba05-da33bb8f0f2e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a01bb4-02b5-7c05-89ff-12574f03539a" xlink:to="loc_us-gaap_DebtInstrumentTable_01a01bb4-02b5-78ad-ba05-da33bb8f0f2e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_01a01bb4-02b5-72e6-a8d3-eba63b7a230c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_01a01bb4-02b5-78ad-ba05-da33bb8f0f2e" xlink:to="loc_us-gaap_DebtInstrumentAxis_01a01bb4-02b5-72e6-a8d3-eba63b7a230c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a01bb4-02b5-72e6-a8d3-eba63b7a230c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_01a01bb4-02b5-72e6-a8d3-eba63b7a230c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a01bb4-02b5-72e6-a8d3-eba63b7a230c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a01bb4-02b5-7e2d-837a-63bd146f6be9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_01a01bb4-02b5-72e6-a8d3-eba63b7a230c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a01bb4-02b5-7e2d-837a-63bd146f6be9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_A5.65300MWEDebenturesDue03152056Member_01a01bb4-02b5-7f6f-81d1-ba81e0918dc0" xlink:href="wep-20260930.xsd#wep_A5.65300MWEDebenturesDue03152056Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a01bb4-02b5-7e2d-837a-63bd146f6be9" xlink:to="loc_wep_A5.65300MWEDebenturesDue03152056Member_01a01bb4-02b5-7f6f-81d1-ba81e0918dc0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_A4.65400MWEDebenturesDue06152031Member_01a01bb4-02b5-722e-a77d-390cc68bcd3a" xlink:href="wep-20260930.xsd#wep_A4.65400MWEDebenturesDue06152031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a01bb4-02b5-7e2d-837a-63bd146f6be9" xlink:to="loc_wep_A4.65400MWEDebenturesDue06152031Member_01a01bb4-02b5-722e-a77d-390cc68bcd3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_A5.10400MWEDebenturesDue06152036Member_01a01bb4-02b5-76ab-a7a4-1548774d7dea" xlink:href="wep-20260930.xsd#wep_A5.10400MWEDebenturesDue06152036Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a01bb4-02b5-7e2d-837a-63bd146f6be9" xlink:to="loc_wep_A5.10400MWEDebenturesDue06152036Member_01a01bb4-02b5-76ab-a7a4-1548774d7dea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_01a01bb4-02b5-78b8-a037-549c5f02667f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a01bb4-02b5-7c05-89ff-12574f03539a" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_01a01bb4-02b5-78b8-a037-549c5f02667f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_01a01bb4-02b5-7578-bcbc-dee694a36cd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a01bb4-02b5-7c05-89ff-12574f03539a" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_01a01bb4-02b5-7578-bcbc-dee694a36cd1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/LEASESFINANCELEASESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#LEASESFINANCELEASESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/LEASESFINANCELEASESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7176-8a47-2b5af140be7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_01a01bb4-02b5-77f7-9ca8-85964ceb3642" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7176-8a47-2b5af140be7c" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_01a01bb4-02b5-77f7-9ca8-85964ceb3642" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_01a01bb4-02b5-7d73-ae10-8865896a742e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_01a01bb4-02b5-77f7-9ca8-85964ceb3642" xlink:to="loc_srt_CounterpartyNameAxis_01a01bb4-02b5-7d73-ae10-8865896a742e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-7d73-ae10-8865896a742e_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_01a01bb4-02b5-7d73-ae10-8865896a742e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-7d73-ae10-8865896a742e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-771a-8e56-fad31c8c7320" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_01a01bb4-02b5-7d73-ae10-8865896a742e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-771a-8e56-fad31c8c7320" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_LeasesAcquiredDuring2026Member_01a01bb4-02b5-7e18-835a-8d0b26b27dc1" xlink:href="wep-20260930.xsd#wep_LeasesAcquiredDuring2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-771a-8e56-fad31c8c7320" xlink:to="loc_wep_LeasesAcquiredDuring2026Member_01a01bb4-02b5-7e18-835a-8d0b26b27dc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_MinimumNumberOfContractRenwels_01a18377-566d-74a3-9543-61161e3d55f6" xlink:href="wep-20260930.xsd#wep_MinimumNumberOfContractRenwels"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7176-8a47-2b5af140be7c" xlink:to="loc_wep_MinimumNumberOfContractRenwels_01a18377-566d-74a3-9543-61161e3d55f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_01a01bb4-02b5-7103-99b9-3d4c13885c1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7176-8a47-2b5af140be7c" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_01a01bb4-02b5-7103-99b9-3d4c13885c1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_01a01bb4-02b5-74ca-be3f-a69b828e38ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7176-8a47-2b5af140be7c" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_01a01bb4-02b5-74ca-be3f-a69b828e38ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_01a01bb4-02b5-7ab4-83a8-03b35da9d9e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7176-8a47-2b5af140be7c" xlink:to="loc_us-gaap_FinanceLeaseLiability_01a01bb4-02b5-7ab4-83a8-03b35da9d9e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_01a01bb4-02b5-7eba-a413-2901197aea28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7176-8a47-2b5af140be7c" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_01a01bb4-02b5-7eba-a413-2901197aea28" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_01a01bb4-02b5-7791-9da0-af17f1269257" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7176-8a47-2b5af140be7c" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_01a01bb4-02b5-7791-9da0-af17f1269257" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/LEASESFUTUREMINIMUMLEASEPAYMENTSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#LEASESFUTUREMINIMUMLEASEPAYMENTSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/LEASESFUTUREMINIMUMLEASEPAYMENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7f52-9b28-15032f0f0b27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_01a01bb4-02b5-721f-95d2-eeb286fc5958" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7f52-9b28-15032f0f0b27" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_01a01bb4-02b5-721f-95d2-eeb286fc5958" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_01a01bb4-02b5-7159-9577-f60d63a15c73" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_01a01bb4-02b5-721f-95d2-eeb286fc5958" xlink:to="loc_srt_CounterpartyNameAxis_01a01bb4-02b5-7159-9577-f60d63a15c73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-7159-9577-f60d63a15c73_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_01a01bb4-02b5-7159-9577-f60d63a15c73" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-7159-9577-f60d63a15c73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-70f5-88f4-c5b31c5cac08" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_01a01bb4-02b5-7159-9577-f60d63a15c73" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-70f5-88f4-c5b31c5cac08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_LeasesAcquiredDuring2026Member_01a01bb4-02b5-7081-8c54-a3ee11b51c40" xlink:href="wep-20260930.xsd#wep_LeasesAcquiredDuring2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_01a01bb4-02b5-70f5-88f4-c5b31c5cac08" xlink:to="loc_wep_LeasesAcquiredDuring2026Member_01a01bb4-02b5-7081-8c54-a3ee11b51c40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_01a01bb4-02b5-7f52-9b28-15032f0f0b27" xlink:to="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_01a01bb4-02b5-7c3a-bd89-f609caf0165d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_01a01bb4-02b5-7c3a-bd89-f609caf0165d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_01a01bb4-02b5-7bc3-9870-7f1d19525266" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_01a01bb4-02b5-7bc3-9870-7f1d19525266" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_01a01bb4-02b5-7497-8662-eb751c7f47f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_01a01bb4-02b5-7497-8662-eb751c7f47f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_01a01bb4-02b5-76b9-b8d6-e728d16b843c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_01a01bb4-02b5-76b9-b8d6-e728d16b843c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_01a01bb4-02b5-72fa-8bcd-c8073c6e1cdb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_01a01bb4-02b5-72fa-8bcd-c8073c6e1cdb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_01a01bb4-02b5-72c8-82d8-66253576900e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_01a01bb4-02b5-72c8-82d8-66253576900e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_01a01bb4-02b5-7a93-82e2-b6a84bb23eea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_01a01bb4-02b5-7a93-82e2-b6a84bb23eea" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_01a01bb4-02b5-7cff-85ea-dba6b0347cd5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_01a01bb4-02b5-7cff-85ea-dba6b0347cd5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_01a01bb4-02b5-7bac-a0bc-3ce618d719d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_01a01bb4-02b5-7bac-a0bc-3ce618d719d5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_01a01bb4-02b5-7e6e-bccf-d4eb0a8ce2ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiability_01a01bb4-02b5-7e6e-bccf-d4eb0a8ce2ad" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_01a01bb4-02b5-7d8c-8373-39f1ac7f7fae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_01a01bb4-02b5-7d8c-8373-39f1ac7f7fae" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_01a01bb4-02b5-754e-91eb-7d96d049a1f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_01a01bb4-02b5-7d47-a572-bbde04f70c73" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_01a01bb4-02b5-754e-91eb-7d96d049a1f0" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/INCOMETAXESSTATUTORYRATERECONCILIATIONDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#INCOMETAXESSTATUTORYRATERECONCILIATIONDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/INCOMETAXESSTATUTORYRATERECONCILIATIONDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_01a01bb4-02b5-7e24-806c-2002abb47787" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_01a01bb4-02b5-7205-bebf-dad9079b145d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_01a01bb4-02b5-7e24-806c-2002abb47787" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_01a01bb4-02b5-7205-bebf-dad9079b145d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_RateCaseYearAxis_01a01bb4-02b5-75b9-a1b2-12d3780ee089" xlink:href="wep-20260930.xsd#wep_RateCaseYearAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_01a01bb4-02b5-7205-bebf-dad9079b145d" xlink:to="loc_wep_RateCaseYearAxis_01a01bb4-02b5-75b9-a1b2-12d3780ee089" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_RateCaseYearDomain_01a01bb4-02b5-75b9-a1b2-12d3780ee089_default" xlink:href="wep-20260930.xsd#wep_RateCaseYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_wep_RateCaseYearAxis_01a01bb4-02b5-75b9-a1b2-12d3780ee089" xlink:to="loc_wep_RateCaseYearDomain_01a01bb4-02b5-75b9-a1b2-12d3780ee089_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_RateCaseYearDomain_01a01bb4-02b5-797f-b282-98422d2f6ab4" xlink:href="wep-20260930.xsd#wep_RateCaseYearDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_wep_RateCaseYearAxis_01a01bb4-02b5-75b9-a1b2-12d3780ee089" xlink:to="loc_wep_RateCaseYearDomain_01a01bb4-02b5-797f-b282-98422d2f6ab4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_Rate2018And2019Member_01a01bb4-02b5-7503-af8d-096ee71d78cd" xlink:href="wep-20260930.xsd#wep_Rate2018And2019Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_RateCaseYearDomain_01a01bb4-02b5-797f-b282-98422d2f6ab4" xlink:to="loc_wep_Rate2018And2019Member_01a01bb4-02b5-7503-af8d-096ee71d78cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7024-9085-8ddb1415d1c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_01a01bb4-02b5-7205-bebf-dad9079b145d" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7024-9085-8ddb1415d1c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7024-9085-8ddb1415d1c9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7024-9085-8ddb1415d1c9" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7024-9085-8ddb1415d1c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-76b9-aa3e-a0d9866e896a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7024-9085-8ddb1415d1c9" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-76b9-aa3e-a0d9866e896a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PublicServiceCommissionOfWisconsinPSCWMember_01a01bb4-02b5-75f1-a64f-87b73586f746" xlink:href="wep-20260930.xsd#wep_PublicServiceCommissionOfWisconsinPSCWMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-76b9-aa3e-a0d9866e896a" xlink:to="loc_wep_PublicServiceCommissionOfWisconsinPSCWMember_01a01bb4-02b5-75f1-a64f-87b73586f746" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-02b5-7202-83ad-42c26b9c515a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_01a01bb4-02b5-7205-bebf-dad9079b145d" xlink:to="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-02b5-7202-83ad-42c26b9c515a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-7202-83ad-42c26b9c515a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-02b5-7202-83ad-42c26b9c515a" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-7202-83ad-42c26b9c515a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-7ed8-ae09-2911271b2d87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-02b5-7202-83ad-42c26b9c515a" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-7ed8-ae09-2911271b2d87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TaxCutsAndJobsActOf2017Member_01a01bb4-02b5-7696-9c8b-c339c69c3f4f" xlink:href="wep-20260930.xsd#wep_TaxCutsAndJobsActOf2017Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-7ed8-ae09-2911271b2d87" xlink:to="loc_wep_TaxCutsAndJobsActOf2017Member_01a01bb4-02b5-7696-9c8b-c339c69c3f4f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_IncomeStatementImpactOfAmortizingProtectedTaxBenefits_01a01bb4-02b5-713f-945a-05e1686ef9df" xlink:href="wep-20260930.xsd#wep_IncomeStatementImpactOfAmortizingProtectedTaxBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_01a01bb4-02b5-7e24-806c-2002abb47787" xlink:to="loc_wep_IncomeStatementImpactOfAmortizingProtectedTaxBenefits_01a01bb4-02b5-713f-945a-05e1686ef9df" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/INCOMETAXESCASHPAIDFORINCOMETAXESNETDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#INCOMETAXESCASHPAIDFORINCOMETAXESNETDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/INCOMETAXESCASHPAIDFORINCOMETAXESNETDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_wep_IncomeTaxesLineItems_01a01bb4-02b5-735e-adb7-abdce0190957" xlink:href="wep-20260930.xsd#wep_IncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_IncomeTaxesTable_01a01bb4-02b5-7ca5-ac1e-944078eb84c4" xlink:href="wep-20260930.xsd#wep_IncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_wep_IncomeTaxesLineItems_01a01bb4-02b5-735e-adb7-abdce0190957" xlink:to="loc_wep_IncomeTaxesTable_01a01bb4-02b5-7ca5-ac1e-944078eb84c4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_01a01bb4-02b5-78b8-af60-94cc9bc44c39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wep_IncomeTaxesTable_01a01bb4-02b5-7ca5-ac1e-944078eb84c4" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_01a01bb4-02b5-78b8-af60-94cc9bc44c39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_01a01bb4-02b5-78b8-af60-94cc9bc44c39_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_01a01bb4-02b5-78b8-af60-94cc9bc44c39" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_01a01bb4-02b5-78b8-af60-94cc9bc44c39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_01a01bb4-02b5-7e15-a426-05ac592e16aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_01a01bb4-02b5-78b8-af60-94cc9bc44c39" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_01a01bb4-02b5-7e15-a426-05ac592e16aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_WisconsinTaxingJurisdicationMember_01a01bb4-02b5-781a-983b-15217270262a" xlink:href="wep-20260930.xsd#wep_WisconsinTaxingJurisdicationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_01a01bb4-02b5-7e15-a426-05ac592e16aa" xlink:to="loc_wep_WisconsinTaxingJurisdicationMember_01a01bb4-02b5-781a-983b-15217270262a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_01a01bb4-02b5-7fc3-8df3-cc90dcaa437a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidFederalAfterRefundReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_IncomeTaxesLineItems_01a01bb4-02b5-735e-adb7-abdce0190957" xlink:to="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_01a01bb4-02b5-7fc3-8df3-cc90dcaa437a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_01a01bb4-02b5-72de-84dc-7ce84f1e93e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_IncomeTaxesLineItems_01a01bb4-02b5-735e-adb7-abdce0190957" xlink:to="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_01a01bb4-02b5-72de-84dc-7ce84f1e93e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_01a01bb4-02b5-7ddd-8ba8-59f8587ffa11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_IncomeTaxesLineItems_01a01bb4-02b5-735e-adb7-abdce0190957" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_01a01bb4-02b5-7ddd-8ba8-59f8587ffa11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_SaleOfProductionTaxCreditCashReceived_01a01bb4-02b5-7b70-bb47-e13a1f8804d3" xlink:href="wep-20260930.xsd#wep_SaleOfProductionTaxCreditCashReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_IncomeTaxesLineItems_01a01bb4-02b5-735e-adb7-abdce0190957" xlink:to="loc_wep_SaleOfProductionTaxCreditCashReceived_01a01bb4-02b5-7b70-bb47-e13a1f8804d3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_SaleOfInvestmentTaxCreditCashReceived_01a179c0-f3cf-7d8e-abac-de72edc2cd58" xlink:href="wep-20260930.xsd#wep_SaleOfInvestmentTaxCreditCashReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_IncomeTaxesLineItems_01a01bb4-02b5-735e-adb7-abdce0190957" xlink:to="loc_wep_SaleOfInvestmentTaxCreditCashReceived_01a179c0-f3cf-7d8e-abac-de72edc2cd58" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/FAIRVALUEMEASUREMENTSASSETSANDLIABILITIESMEASUREDONARECURRINGBASISDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#FAIRVALUEMEASUREMENTSASSETSANDLIABILITIESMEASUREDONARECURRINGBASISDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/FAIRVALUEMEASUREMENTSASSETSANDLIABILITIESMEASUREDONARECURRINGBASISDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a01bb4-02b5-7bd1-a1d9-6af144e312d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a01bb4-02b5-7feb-b376-02314c2a08ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a01bb4-02b5-7bd1-a1d9-6af144e312d1" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a01bb4-02b5-7feb-b376-02314c2a08ae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_01a01bb4-02b5-7449-8aa9-5d29a79ca69f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a01bb4-02b5-7feb-b376-02314c2a08ae" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_01a01bb4-02b5-7449-8aa9-5d29a79ca69f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_01a01bb4-02b5-7449-8aa9-5d29a79ca69f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_01a01bb4-02b5-7449-8aa9-5d29a79ca69f" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_01a01bb4-02b5-7449-8aa9-5d29a79ca69f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_01a01bb4-02b5-7854-a234-5f0197bf5d3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_01a01bb4-02b5-7449-8aa9-5d29a79ca69f" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_01a01bb4-02b5-7854-a234-5f0197bf5d3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_01a01bb4-02b5-79dc-b1e9-7e82b9a4d5bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_01a01bb4-02b5-7854-a234-5f0197bf5d3c" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_01a01bb4-02b5-79dc-b1e9-7e82b9a4d5bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-73d7-a1f5-f8d8ea61de34" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a01bb4-02b5-7feb-b376-02314c2a08ae" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-73d7-a1f5-f8d8ea61de34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-73d7-a1f5-f8d8ea61de34_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-73d7-a1f5-f8d8ea61de34" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-73d7-a1f5-f8d8ea61de34_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7793-a142-57c8e6f8d4e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-73d7-a1f5-f8d8ea61de34" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7793-a142-57c8e6f8d4e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CommodityContractNaturalGasMember_01a01bb4-02b5-7098-9be8-b70fd8dc29b0" xlink:href="wep-20260930.xsd#wep_CommodityContractNaturalGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7793-a142-57c8e6f8d4e9" xlink:to="loc_wep_CommodityContractNaturalGasMember_01a01bb4-02b5-7098-9be8-b70fd8dc29b0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CommodityContractTransmissionCongestionRightsMember_01a01bb4-02b5-7932-a922-bbf67871f20b" xlink:href="wep-20260930.xsd#wep_CommodityContractTransmissionCongestionRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7793-a142-57c8e6f8d4e9" xlink:to="loc_wep_CommodityContractTransmissionCongestionRightsMember_01a01bb4-02b5-7932-a922-bbf67871f20b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a01bb4-02b5-723d-b895-dda7dc212acc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_01a01bb4-02b5-7feb-b376-02314c2a08ae" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a01bb4-02b5-723d-b895-dda7dc212acc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a01bb4-02b5-723d-b895-dda7dc212acc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a01bb4-02b5-723d-b895-dda7dc212acc" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a01bb4-02b5-723d-b895-dda7dc212acc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a01bb4-02b5-795c-8391-c36b4809aa4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_01a01bb4-02b5-723d-b895-dda7dc212acc" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a01bb4-02b5-795c-8391-c36b4809aa4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_01a01bb4-02b5-7854-baad-8680e742367a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a01bb4-02b5-795c-8391-c36b4809aa4b" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_01a01bb4-02b5-7854-baad-8680e742367a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_01a01bb4-02b5-7f87-a5e6-49e4c4da0d26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a01bb4-02b5-795c-8391-c36b4809aa4b" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_01a01bb4-02b5-7f87-a5e6-49e4c4da0d26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_01a01bb4-02b5-7ee9-bd18-4c8efc772d5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_01a01bb4-02b5-795c-8391-c36b4809aa4b" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_01a01bb4-02b5-7ee9-bd18-4c8efc772d5f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_01a01bb4-02b5-7bde-8b58-7accc845657d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a01bb4-02b5-7bd1-a1d9-6af144e312d1" xlink:to="loc_us-gaap_AssetsAbstract_01a01bb4-02b5-7bde-8b58-7accc845657d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_01a01bb4-02b5-7628-82ed-4bb00b1f09bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a01bb4-02b5-7bde-8b58-7accc845657d" xlink:to="loc_us-gaap_DerivativeAssets_01a01bb4-02b5-7628-82ed-4bb00b1f09bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-72ac-a30f-4414306fa78c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a01bb4-02b5-7bd1-a1d9-6af144e312d1" xlink:to="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-72ac-a30f-4414306fa78c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_01a01bb4-02b5-7536-8bac-70d125869e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-72ac-a30f-4414306fa78c" xlink:to="loc_us-gaap_DerivativeLiabilities_01a01bb4-02b5-7536-8bac-70d125869e9d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/FAIRVALUEMEASUREMENTSFINANCIALINSTRUMENTSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#FAIRVALUEMEASUREMENTSFINANCIALINSTRUMENTSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/FAIRVALUEMEASUREMENTSFINANCIALINSTRUMENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_01a01bb4-02b5-71e4-bee9-eca97d99c2f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_01a01bb4-02b5-782f-a884-67d241b6ce8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_01a01bb4-02b5-71e4-bee9-eca97d99c2f2" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_01a01bb4-02b5-782f-a884-67d241b6ce8d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_01a01bb4-02b5-7fa8-bfbf-94ba17b78201" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_01a01bb4-02b5-782f-a884-67d241b6ce8d" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_01a01bb4-02b5-7fa8-bfbf-94ba17b78201" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a01bb4-02b5-7fa8-bfbf-94ba17b78201_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_01a01bb4-02b5-7fa8-bfbf-94ba17b78201" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a01bb4-02b5-7fa8-bfbf-94ba17b78201_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_01a01bb4-02b5-7ed0-acfa-14ca73a1c037" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_01a01bb4-02b5-7fa8-bfbf-94ba17b78201" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_01a01bb4-02b5-7ed0-acfa-14ca73a1c037" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a01bb4-02b5-7eaf-9855-5a79ab6d6eda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_01a01bb4-02b5-7ed0-acfa-14ca73a1c037" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_01a01bb4-02b5-7eaf-9855-5a79ab6d6eda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_01a01bb4-02b5-72a3-b934-130148d75f4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_01a01bb4-02b5-7ed0-acfa-14ca73a1c037" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_01a01bb4-02b5-72a3-b934-130148d75f4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_01a01bb4-02b5-7d8d-9dad-08eab1696955" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_01a01bb4-02b5-7ed0-acfa-14ca73a1c037" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_01a01bb4-02b5-7d8d-9dad-08eab1696955" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_01a01bb4-02b5-7429-84bb-feb1cc533efe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_01a01bb4-02b5-71e4-bee9-eca97d99c2f2" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_01a01bb4-02b5-7429-84bb-feb1cc533efe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_01a01bb4-02b5-7b78-a491-d3ab24f52484" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_01a01bb4-02b5-7429-84bb-feb1cc533efe" xlink:to="loc_us-gaap_PreferredStockValue_01a01bb4-02b5-7b78-a491-d3ab24f52484" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_01a01bb4-02b5-7916-8931-84c9fda1e2f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_01a01bb4-02b5-7429-84bb-feb1cc533efe" xlink:to="loc_us-gaap_LongTermDebt_01a01bb4-02b5-7916-8931-84c9fda1e2f5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/DERIVATIVEINSTRUMENTSDERIVATIVEASSETSANDLIABILITIESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#DERIVATIVEINSTRUMENTSDERIVATIVEASSETSANDLIABILITIESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/DERIVATIVEINSTRUMENTSDERIVATIVEASSETSANDLIABILITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-7ad1-ab39-15c39e37ac8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_01a01bb4-02b5-7b4d-98c3-27b0be48a3c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-7ad1-ab39-15c39e37ac8e" xlink:to="loc_us-gaap_DerivativeTable_01a01bb4-02b5-7b4d-98c3-27b0be48a3c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_01a01bb4-02b5-7dba-a0ff-83abb282befd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_01a01bb4-02b5-7b4d-98c3-27b0be48a3c6" xlink:to="loc_us-gaap_HedgingDesignationAxis_01a01bb4-02b5-7dba-a0ff-83abb282befd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_01a01bb4-02b5-7dba-a0ff-83abb282befd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_01a01bb4-02b5-7dba-a0ff-83abb282befd" xlink:to="loc_us-gaap_HedgingDesignationDomain_01a01bb4-02b5-7dba-a0ff-83abb282befd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_01a01bb4-02b5-7980-a674-21c661b87064" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_01a01bb4-02b5-7dba-a0ff-83abb282befd" xlink:to="loc_us-gaap_HedgingDesignationDomain_01a01bb4-02b5-7980-a674-21c661b87064" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_01a01bb4-02b5-72f7-ad85-5ca39d6f73e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_01a01bb4-02b5-7980-a674-21c661b87064" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_01a01bb4-02b5-72f7-ad85-5ca39d6f73e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-7cfd-8d48-1fd56cce9558" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_01a01bb4-02b5-7b4d-98c3-27b0be48a3c6" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-7cfd-8d48-1fd56cce9558" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7cfd-8d48-1fd56cce9558_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-7cfd-8d48-1fd56cce9558" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7cfd-8d48-1fd56cce9558_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7f14-bffd-1e53e982f086" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-7cfd-8d48-1fd56cce9558" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7f14-bffd-1e53e982f086" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CommodityContractNaturalGasMember_01a01bb4-02b5-7921-9a00-7a0a5090e74c" xlink:href="wep-20260930.xsd#wep_CommodityContractNaturalGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7f14-bffd-1e53e982f086" xlink:to="loc_wep_CommodityContractNaturalGasMember_01a01bb4-02b5-7921-9a00-7a0a5090e74c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CommodityContractTransmissionCongestionRightsMember_01a01bb4-02b5-70ea-98f8-b77b9a590c7b" xlink:href="wep-20260930.xsd#wep_CommodityContractTransmissionCongestionRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7f14-bffd-1e53e982f086" xlink:to="loc_wep_CommodityContractTransmissionCongestionRightsMember_01a01bb4-02b5-70ea-98f8-b77b9a590c7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_01a01bb4-02b5-7c4e-b99a-013728c2477b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNumberOfInstrumentsHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-7ad1-ab39-15c39e37ac8e" xlink:to="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_01a01bb4-02b5-7c4e-b99a-013728c2477b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_01a01bb4-02b5-73fd-aa22-6fd3286d8568" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-7ad1-ab39-15c39e37ac8e" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_01a01bb4-02b5-73fd-aa22-6fd3286d8568" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_01a01bb4-02b5-7b4a-9779-8e8776cd023d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_01a01bb4-02b5-73fd-aa22-6fd3286d8568" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_01a01bb4-02b5-7b4a-9779-8e8776cd023d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_01a01bb4-02b5-7979-acbc-f3c9114b5ba4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_01a01bb4-02b5-73fd-aa22-6fd3286d8568" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_01a01bb4-02b5-7979-acbc-f3c9114b5ba4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_01a01bb4-02b5-76cd-9a05-5a40a518815d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_01a01bb4-02b5-73fd-aa22-6fd3286d8568" xlink:to="loc_us-gaap_DerivativeAssets_01a01bb4-02b5-76cd-9a05-5a40a518815d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetCurrentStatementOfFinancialPositionExtensibleEnumeration_01a01bb4-02b5-7396-89d9-129f44870db8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetCurrentStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_01a01bb4-02b5-73fd-aa22-6fd3286d8568" xlink:to="loc_us-gaap_DerivativeAssetCurrentStatementOfFinancialPositionExtensibleEnumeration_01a01bb4-02b5-7396-89d9-129f44870db8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNoncurrentStatementOfFinancialPositionExtensibleEnumeration_01a01bb4-02b5-7228-807d-0900cb6e7929" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetNoncurrentStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_01a01bb4-02b5-73fd-aa22-6fd3286d8568" xlink:to="loc_us-gaap_DerivativeAssetNoncurrentStatementOfFinancialPositionExtensibleEnumeration_01a01bb4-02b5-7228-807d-0900cb6e7929" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_01a01bb4-02b5-7875-8397-627bb5199a06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-7ad1-ab39-15c39e37ac8e" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_01a01bb4-02b5-7875-8397-627bb5199a06" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_01a01bb4-02b5-7ba8-b773-59e6dbfdbd63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_01a01bb4-02b5-7875-8397-627bb5199a06" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_01a01bb4-02b5-7ba8-b773-59e6dbfdbd63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_01a01bb4-02b5-7d38-beac-f7edc18d8430" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_01a01bb4-02b5-7875-8397-627bb5199a06" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_01a01bb4-02b5-7d38-beac-f7edc18d8430" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_01a01bb4-02b5-79e0-834c-426501871808" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_01a01bb4-02b5-7875-8397-627bb5199a06" xlink:to="loc_us-gaap_DerivativeLiabilities_01a01bb4-02b5-79e0-834c-426501871808" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityCurrentStatementOfFinancialPositionExtensibleEnumeration_01a01bb4-02b5-7a9b-afad-77a403304408" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityCurrentStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_01a01bb4-02b5-7875-8397-627bb5199a06" xlink:to="loc_us-gaap_DerivativeLiabilityCurrentStatementOfFinancialPositionExtensibleEnumeration_01a01bb4-02b5-7a9b-afad-77a403304408" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNoncurrentStatementOfFinancialPositionExtensibleEnumeration_01a01bb4-02b5-749a-b485-89f875040ea0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityNoncurrentStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_01a01bb4-02b5-7875-8397-627bb5199a06" xlink:to="loc_us-gaap_DerivativeLiabilityNoncurrentStatementOfFinancialPositionExtensibleEnumeration_01a01bb4-02b5-749a-b485-89f875040ea0" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/DERIVATIVEINSTRUMENTSGAINSLOSSESANDNOTIONALVOLUMESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#DERIVATIVEINSTRUMENTSGAINSLOSSESANDNOTIONALVOLUMESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/DERIVATIVEINSTRUMENTSGAINSLOSSESANDNOTIONALVOLUMESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-71fb-805d-9e7452f1d247" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_01a01bb4-02b5-72c2-af90-ccd2b19b5263" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-71fb-805d-9e7452f1d247" xlink:to="loc_us-gaap_DerivativeTable_01a01bb4-02b5-72c2-af90-ccd2b19b5263" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-79b9-b8d2-e7e2ade6dc28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_01a01bb4-02b5-72c2-af90-ccd2b19b5263" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-79b9-b8d2-e7e2ade6dc28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-79b9-b8d2-e7e2ade6dc28_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-79b9-b8d2-e7e2ade6dc28" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-79b9-b8d2-e7e2ade6dc28_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7fc9-a449-b251313ca639" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_01a01bb4-02b5-79b9-b8d2-e7e2ade6dc28" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7fc9-a449-b251313ca639" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CommodityContractNaturalGasMember_01a01bb4-02b5-72eb-9d52-dd016b7edc91" xlink:href="wep-20260930.xsd#wep_CommodityContractNaturalGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7fc9-a449-b251313ca639" xlink:to="loc_wep_CommodityContractNaturalGasMember_01a01bb4-02b5-72eb-9d52-dd016b7edc91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CommodityContractTransmissionCongestionRightsMember_01a01bb4-02b5-7506-b745-658b5fecc6ee" xlink:href="wep-20260930.xsd#wep_CommodityContractTransmissionCongestionRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_01a01bb4-02b5-7fc9-a449-b251313ca639" xlink:to="loc_wep_CommodityContractTransmissionCongestionRightsMember_01a01bb4-02b5-7506-b745-658b5fecc6ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_01a01bb4-02b5-7fd1-898e-f5a2e22bcd91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-71fb-805d-9e7452f1d247" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_01a01bb4-02b5-7fd1-898e-f5a2e22bcd91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_01a01bb4-02b5-7990-ac43-e46a2a356089" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_01a01bb4-02b5-7fd1-898e-f5a2e22bcd91" xlink:to="loc_us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_01a01bb4-02b5-7990-ac43-e46a2a356089" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_01a01bb4-02b5-7d9c-b423-406b9493e6fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_01a01bb4-02b5-7fd1-898e-f5a2e22bcd91" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_01a01bb4-02b5-7d9c-b423-406b9493e6fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotionalAmountOfDerivativesAbstract_01a01bb4-02b5-744a-a9ed-77638e4fa1de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotionalAmountOfDerivativesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_01a01bb4-02b5-71fb-805d-9e7452f1d247" xlink:to="loc_us-gaap_NotionalAmountOfDerivativesAbstract_01a01bb4-02b5-744a-a9ed-77638e4fa1de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_01a01bb4-02b5-73b4-bacc-4d4dd9fea425" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NotionalAmountOfDerivativesAbstract_01a01bb4-02b5-744a-a9ed-77638e4fa1de" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_01a01bb4-02b5-73b4-bacc-4d4dd9fea425" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/GUARANTEESDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#GUARANTEESDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/GUARANTEESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsLineItems_01a01bb4-02b5-7e29-9547-022ce479d713" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_01a01bb4-02b5-790e-a5da-45bd2aec6a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_01a01bb4-02b5-7e29-9547-022ce479d713" xlink:to="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_01a01bb4-02b5-790e-a5da-45bd2aec6a3a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_01a01bb4-02b5-7b1d-9bb5-a47f16ec4ee6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_01a01bb4-02b5-790e-a5da-45bd2aec6a3a" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_01a01bb4-02b5-7b1d-9bb5-a47f16ec4ee6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_01a01bb4-02b5-7b1d-9bb5-a47f16ec4ee6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_01a01bb4-02b5-7b1d-9bb5-a47f16ec4ee6" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_01a01bb4-02b5-7b1d-9bb5-a47f16ec4ee6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_01a01bb4-02b5-79f8-a6b5-9e2d6c7474b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_01a01bb4-02b5-7b1d-9bb5-a47f16ec4ee6" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_01a01bb4-02b5-79f8-a6b5-9e2d6c7474b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_01a01bb4-02b5-7b35-ba29-d6c8b5ee049d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StandbyLettersOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_01a01bb4-02b5-79f8-a6b5-9e2d6c7474b5" xlink:to="loc_us-gaap_StandbyLettersOfCreditMember_01a01bb4-02b5-7b35-ba29-d6c8b5ee049d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_01a01bb4-02b5-7d11-bdc3-94a984643593" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_01a01bb4-02b5-7e29-9547-022ce479d713" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_01a01bb4-02b5-7d11-bdc3-94a984643593" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_GuaranteeObligationsMaximumExposureExpireOverThreeYears_01a01bb4-02b5-72dc-8aa3-6fabe2188db3" xlink:href="wep-20260930.xsd#wep_GuaranteeObligationsMaximumExposureExpireOverThreeYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_01a01bb4-02b5-7e29-9547-022ce479d713" xlink:to="loc_wep_GuaranteeObligationsMaximumExposureExpireOverThreeYears_01a01bb4-02b5-72dc-8aa3-6fabe2188db3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_GuaranteeObligationsMaximumExposureExpireLessThanOneYear_01a01bb4-02b5-7459-b25f-5f11a0a26cb9" xlink:href="wep-20260930.xsd#wep_GuaranteeObligationsMaximumExposureExpireLessThanOneYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_01a01bb4-02b5-7e29-9547-022ce479d713" xlink:to="loc_wep_GuaranteeObligationsMaximumExposureExpireLessThanOneYear_01a01bb4-02b5-7459-b25f-5f11a0a26cb9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/EMPLOYEEBENEFITSCOSTSANDCONTRIBUTIONSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#EMPLOYEEBENEFITSCOSTSANDCONTRIBUTIONSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/EMPLOYEEBENEFITSCOSTSANDCONTRIBUTIONSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_01a01bb4-02b5-756d-894d-a7bcc25c1297" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_01a01bb4-02b5-7f46-92fb-25ee020ce9ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_01a01bb4-02b5-756d-894d-a7bcc25c1297" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_01a01bb4-02b5-7f46-92fb-25ee020ce9ca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_01a01bb4-02b5-7936-8d24-750bb4540052" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_01a01bb4-02b5-7f46-92fb-25ee020ce9ca" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_01a01bb4-02b5-7936-8d24-750bb4540052" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_01a01bb4-02b5-7936-8d24-750bb4540052_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_01a01bb4-02b5-7936-8d24-750bb4540052" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_01a01bb4-02b5-7936-8d24-750bb4540052_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_01a01bb4-02b5-7799-9ef1-22dcc4c8501a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_01a01bb4-02b5-7936-8d24-750bb4540052" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_01a01bb4-02b5-7799-9ef1-22dcc4c8501a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_01a01bb4-02b5-7ebc-be9f-f0159c0707c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_01a01bb4-02b5-7799-9ef1-22dcc4c8501a" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_01a01bb4-02b5-7ebc-be9f-f0159c0707c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_01a01bb4-02b5-778c-bc22-0c742535cb57" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_01a01bb4-02b5-7799-9ef1-22dcc4c8501a" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_01a01bb4-02b5-778c-bc22-0c742535cb57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-02b5-7e44-b0a9-90f2e47031f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_01a01bb4-02b5-7f46-92fb-25ee020ce9ca" xlink:to="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-02b5-7e44-b0a9-90f2e47031f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7e44-b0a9-90f2e47031f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-02b5-7e44-b0a9-90f2e47031f5" xlink:to="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7e44-b0a9-90f2e47031f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7733-8d22-3a7fd1d9cfce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-02b5-7e44-b0a9-90f2e47031f5" xlink:to="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7733-8d22-3a7fd1d9cfce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PensionAndOtherPostretirementPlansCostMember_01a01bb4-02b5-7279-b1be-fd4b98d458cb" xlink:href="wep-20260930.xsd#wep_PensionAndOtherPostretirementPlansCostMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7733-8d22-3a7fd1d9cfce" xlink:to="loc_wep_PensionAndOtherPostretirementPlansCostMember_01a01bb4-02b5-7279-b1be-fd4b98d458cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-02b5-7a18-bc7e-0d3ef3d3c6b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_01a01bb4-02b5-7f46-92fb-25ee020ce9ca" xlink:to="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-02b5-7a18-bc7e-0d3ef3d3c6b9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-7a18-bc7e-0d3ef3d3c6b9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-02b5-7a18-bc7e-0d3ef3d3c6b9" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-7a18-bc7e-0d3ef3d3c6b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-78d8-9b69-8901c985a816" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryLiabilityAxis_01a01bb4-02b5-7a18-bc7e-0d3ef3d3c6b9" xlink:to="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-78d8-9b69-8901c985a816" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PensionAndOtherPostretirementPlansCostMember_01a01bb4-02b5-7f5a-8d15-e2264997cfbd" xlink:href="wep-20260930.xsd#wep_PensionAndOtherPostretirementPlansCostMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryLiabilityDomain_01a01bb4-02b5-78d8-9b69-8901c985a816" xlink:to="loc_wep_PensionAndOtherPostretirementPlansCostMember_01a01bb4-02b5-7f5a-8d15-e2264997cfbd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_01a01bb4-02b5-7b77-9e8a-eca5e2902c79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_01a01bb4-02b5-756d-894d-a7bcc25c1297" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_01a01bb4-02b5-7b77-9e8a-eca5e2902c79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_01a01bb4-02b5-7e17-a791-136da2c8a6df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_01a01bb4-02b5-7b77-9e8a-eca5e2902c79" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_01a01bb4-02b5-7e17-a791-136da2c8a6df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_01a01bb4-02b5-7b9d-9850-3db52bcd0275" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_01a01bb4-02b5-7b77-9e8a-eca5e2902c79" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_01a01bb4-02b5-7b9d-9850-3db52bcd0275" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_01a01bb4-02b5-7ced-88d4-24bed84c691f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_01a01bb4-02b5-7b77-9e8a-eca5e2902c79" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_01a01bb4-02b5-7ced-88d4-24bed84c691f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_01a01bb4-02b5-7d46-b6cb-40e7ba61ae62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_01a01bb4-02b5-7b77-9e8a-eca5e2902c79" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_01a01bb4-02b5-7d46-b6cb-40e7ba61ae62" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_01a01bb4-02b5-7e55-826c-c34e443825e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_01a01bb4-02b5-7b77-9e8a-eca5e2902c79" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_01a01bb4-02b5-7e55-826c-c34e443825e9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_01a01bb4-02b5-7f61-8f62-054bf3c9fe9f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_01a01bb4-02b5-7b77-9e8a-eca5e2902c79" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_01a01bb4-02b5-7f61-8f62-054bf3c9fe9f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitContributions_01a01bb4-02b5-7784-9d22-63e2a0fa26af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_01a01bb4-02b5-756d-894d-a7bcc25c1297" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitContributions_01a01bb4-02b5-7784-9d22-63e2a0fa26af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_01a01bb4-02b5-7129-9edd-2dd701be0365" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_01a01bb4-02b5-756d-894d-a7bcc25c1297" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_01a01bb4-02b5-7129-9edd-2dd701be0365" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_AmountTransferredOutOfWECEnergyGroupRetireeWelfarePlan_01a18025-99ed-7fbc-b072-fd0c8db7eddb" xlink:href="wep-20260930.xsd#wep_AmountTransferredOutOfWECEnergyGroupRetireeWelfarePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_01a01bb4-02b5-756d-894d-a7bcc25c1297" xlink:to="loc_wep_AmountTransferredOutOfWECEnergyGroupRetireeWelfarePlan_01a18025-99ed-7fbc-b072-fd0c8db7eddb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssets_01a01bb4-02b5-783d-9fa3-40f899af4429" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_01a01bb4-02b5-756d-894d-a7bcc25c1297" xlink:to="loc_us-gaap_RegulatoryAssets_01a01bb4-02b5-783d-9fa3-40f899af4429" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilities_01a01bb4-02b5-7a09-9d3e-1dfe260cf1a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_01a01bb4-02b5-756d-894d-a7bcc25c1297" xlink:to="loc_us-gaap_RegulatoryLiabilities_01a01bb4-02b5-7a09-9d3e-1dfe260cf1a4" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/INTANGIBLEASSETSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#INTANGIBLEASSETSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/INTANGIBLEASSETSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredIndefiniteLivedIntangibleAssetsLineItems_01a182e6-9dad-7b6a-b67a-6d71432609a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AcquiredIndefiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_01a182e1-bbac-78f1-bd92-670f2c438cde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AcquiredIndefiniteLivedIntangibleAssetsLineItems_01a182e6-9dad-7b6a-b67a-6d71432609a5" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_01a182e1-bbac-78f1-bd92-670f2c438cde" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_01a182e3-c6bc-7bb5-890f-31d3c129cf0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_01a182e1-bbac-78f1-bd92-670f2c438cde" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_01a182e3-c6bc-7bb5-890f-31d3c129cf0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a182e3-c6bc-7bb5-890f-31d3c129cf0d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_01a182e3-c6bc-7bb5-890f-31d3c129cf0d" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a182e3-c6bc-7bb5-890f-31d3c129cf0d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a182e9-df73-7875-9aa5-d4c755d68c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_01a182e3-c6bc-7bb5-890f-31d3c129cf0d" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a182e9-df73-7875-9aa5-d4c755d68c9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingAndBroadcastRightsMember_01a182e4-e4ac-7b9b-b10b-2bd0f3549d9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingAndBroadcastRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a182e9-df73-7875-9aa5-d4c755d68c9e" xlink:to="loc_us-gaap_OperatingAndBroadcastRightsMember_01a182e4-e4ac-7b9b-b10b-2bd0f3549d9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractualRightsMember_01a182e5-557a-76fa-b90d-3de2080d4835" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractualRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_01a182e9-df73-7875-9aa5-d4c755d68c9e" xlink:to="loc_us-gaap_ContractualRightsMember_01a182e5-557a-76fa-b90d-3de2080d4835" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_01a182f9-6155-726a-9c40-65983d96eff4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredIndefiniteLivedIntangibleAssetsLineItems_01a182e6-9dad-7b6a-b67a-6d71432609a5" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_01a182f9-6155-726a-9c40-65983d96eff4" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/SEGMENTINFORMATIONDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#SEGMENTINFORMATIONDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/SEGMENTINFORMATIONDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_01a01bb4-02b5-7e6a-b56a-d99d285b4c07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01a01bb4-02b5-7eb7-8bf0-76e38f7cb7fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a01bb4-02b5-7e6a-b56a-d99d285b4c07" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01a01bb4-02b5-7eb7-8bf0-76e38f7cb7fd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-7ecf-adb5-b71b965a840c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01a01bb4-02b5-7eb7-8bf0-76e38f7cb7fd" xlink:to="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-7ecf-adb5-b71b965a840c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7ecf-adb5-b71b965a840c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-7ecf-adb5-b71b965a840c" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7ecf-adb5-b71b965a840c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-74c0-81ef-88cf7f2d259a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-7ecf-adb5-b71b965a840c" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-74c0-81ef-88cf7f2d259a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesMember_01a01bb4-02b5-708b-8d83-512fd51eb2d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-74c0-81ef-88cf7f2d259a" xlink:to="loc_us-gaap_PublicUtilitiesMember_01a01bb4-02b5-708b-8d83-512fd51eb2d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-02b5-77bd-9e8d-ed71c8fb8349" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_01a01bb4-02b5-7eb7-8bf0-76e38f7cb7fd" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-02b5-77bd-9e8d-ed71c8fb8349" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-02b5-77bd-9e8d-ed71c8fb8349_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-02b5-77bd-9e8d-ed71c8fb8349" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-02b5-77bd-9e8d-ed71c8fb8349_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_01a01bb4-02b5-7a57-8ee2-11f1bcf36ad8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_01a01bb4-02b5-77bd-9e8d-ed71c8fb8349" xlink:to="loc_us-gaap_SegmentDomain_01a01bb4-02b5-7a57-8ee2-11f1bcf36ad8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_01a01bb4-02b5-743a-b678-842362cda662" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_01a01bb4-02b5-7a57-8ee2-11f1bcf36ad8" xlink:to="loc_us-gaap_AllOtherSegmentsMember_01a01bb4-02b5-743a-b678-842362cda662" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_01a01bb4-02b5-7b65-aac8-1e124504d693" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a01bb4-02b5-7e6a-b56a-d99d285b4c07" xlink:to="loc_us-gaap_NumberOfReportableSegments_01a01bb4-02b5-7b65-aac8-1e124504d693" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_SignificantItemsReportedInTheOtherSegment_01a01bb4-02b5-7b7a-9591-541427af9951" xlink:href="wep-20260930.xsd#wep_SignificantItemsReportedInTheOtherSegment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a01bb4-02b5-7e6a-b56a-d99d285b4c07" xlink:to="loc_wep_SignificantItemsReportedInTheOtherSegment_01a01bb4-02b5-7b7a-9591-541427af9951" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_FuelAndPurchasedPowerCosts_01a01bb4-02b5-71e9-9e8a-8277a16bb273" xlink:href="wep-20260930.xsd#wep_FuelAndPurchasedPowerCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a01bb4-02b5-7e6a-b56a-d99d285b4c07" xlink:to="loc_wep_FuelAndPurchasedPowerCosts_01a01bb4-02b5-71e9-9e8a-8277a16bb273" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FuelCosts_01a01bb4-02b5-73bb-8054-2dd9f31032c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FuelCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_01a01bb4-02b5-7e6a-b56a-d99d285b4c07" xlink:to="loc_us-gaap_FuelCosts_01a01bb4-02b5-73bb-8054-2dd9f31032c4" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/VARIABLEINTERESTENTITIESWEPCOENVIRONMENTALTRUSTDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#VARIABLEINTERESTENTITIESWEPCOENVIRONMENTALTRUSTDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/VARIABLEINTERESTENTITIESWEPCOENVIRONMENTALTRUSTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_01a01bb4-02b5-7dde-9583-b36fa0cff030" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_01a01bb4-02b5-7eb1-8ac9-7c8a68603550" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_01a01bb4-02b5-7dde-9583-b36fa0cff030" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_01a01bb4-02b5-7eb1-8ac9-7c8a68603550" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-02b5-7ff2-bc99-a56b8e7c8f68" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_01a01bb4-02b5-7eb1-8ac9-7c8a68603550" xlink:to="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-02b5-7ff2-bc99-a56b8e7c8f68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-02b5-7ff2-bc99-a56b8e7c8f68_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-02b5-7ff2-bc99-a56b8e7c8f68" xlink:to="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-02b5-7ff2-bc99-a56b8e7c8f68_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-02b5-7e1c-ae8a-8a007a49d91c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_01a01bb4-02b5-7ff2-bc99-a56b8e7c8f68" xlink:to="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-02b5-7e1c-ae8a-8a007a49d91c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_01a01bb4-02b5-7986-9c9c-281e0e07fcc9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_01a01bb4-02b5-7e1c-ae8a-8a007a49d91c" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_01a01bb4-02b5-7986-9c9c-281e0e07fcc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_SecuritizedRegulatoryAsset_01a01bb4-02b5-71fb-ab4f-0486099cd3a5" xlink:href="wep-20260930.xsd#wep_SecuritizedRegulatoryAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_01a01bb4-02b5-7dde-9583-b36fa0cff030" xlink:to="loc_wep_SecuritizedRegulatoryAsset_01a01bb4-02b5-71fb-ab4f-0486099cd3a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_01a01bb4-02b5-7199-ac6c-d6c67deb0bfa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_01a01bb4-02b5-7dde-9583-b36fa0cff030" xlink:to="loc_us-gaap_AssetsAbstract_01a01bb4-02b5-7199-ac6c-d6c67deb0bfa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_01a01bb4-02b5-7d0a-97e5-726d8ea65194" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a01bb4-02b5-7199-ac6c-d6c67deb0bfa" xlink:to="loc_us-gaap_RestrictedCashCurrent_01a01bb4-02b5-7d0a-97e5-726d8ea65194" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_01a01bb4-02b5-71bf-9738-579cf224c675" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a01bb4-02b5-7199-ac6c-d6c67deb0bfa" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_01a01bb4-02b5-71bf-9738-579cf224c675" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashNoncurrent_01a01bb4-02b5-73e0-bbc3-f3ecc53408fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_01a01bb4-02b5-7199-ac6c-d6c67deb0bfa" xlink:to="loc_us-gaap_RestrictedCashNoncurrent_01a01bb4-02b5-73e0-bbc3-f3ecc53408fd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-75fd-9029-d3f9beebab65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_01a01bb4-02b5-7dde-9583-b36fa0cff030" xlink:to="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-75fd-9029-d3f9beebab65" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_01a01bb4-02b5-7c0b-b7f9-58e25d093b95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-75fd-9029-d3f9beebab65" xlink:to="loc_us-gaap_LongTermDebtCurrent_01a01bb4-02b5-7c0b-b7f9-58e25d093b95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_01a01bb4-02b5-750b-86f5-2cb6af93ca1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-75fd-9029-d3f9beebab65" xlink:to="loc_us-gaap_AccountsPayableCurrent_01a01bb4-02b5-750b-86f5-2cb6af93ca1d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_01a01bb4-02b5-71d4-8b8d-d7ce1f63a37f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-75fd-9029-d3f9beebab65" xlink:to="loc_us-gaap_InterestPayableCurrent_01a01bb4-02b5-71d4-8b8d-d7ce1f63a37f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_01a01bb4-02b5-7a09-8012-9c54282c84d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_01a01bb4-02b5-75fd-9029-d3f9beebab65" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_01a01bb4-02b5-7a09-8012-9c54282c84d6" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/COMMITMENTSANDCONTINGENCIESENVIRONMENTALMATTERSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#COMMITMENTSANDCONTINGENCIESENVIRONMENTALMATTERSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/COMMITMENTSANDCONTINGENCIESENVIRONMENTALMATTERSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_01a01bb4-02b5-747c-b84a-d89e01a4270a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_01a01bb4-02b5-7aee-aa93-db205a11fb46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_01a01bb4-02b5-747c-b84a-d89e01a4270a" xlink:to="loc_us-gaap_LossContingenciesTable_01a01bb4-02b5-7aee-aa93-db205a11fb46" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_01a01bb4-02b5-76ae-b5e9-ac1f69f93fc5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_01a01bb4-02b5-7aee-aa93-db205a11fb46" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_01a01bb4-02b5-76ae-b5e9-ac1f69f93fc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_01a01bb4-02b5-76ae-b5e9-ac1f69f93fc5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_01a01bb4-02b5-76ae-b5e9-ac1f69f93fc5" xlink:to="loc_us-gaap_LossContingencyNatureDomain_01a01bb4-02b5-76ae-b5e9-ac1f69f93fc5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_01a01bb4-02b5-72d5-b2f0-2594d178f81e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_01a01bb4-02b5-76ae-b5e9-ac1f69f93fc5" xlink:to="loc_us-gaap_LossContingencyNatureDomain_01a01bb4-02b5-72d5-b2f0-2594d178f81e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_MercuryAndAirToxicsStandardsMember_01a01bb4-02b5-71fc-b237-61473b989d10" xlink:href="wep-20260930.xsd#wep_MercuryAndAirToxicsStandardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_01a01bb4-02b5-72d5-b2f0-2594d178f81e" xlink:to="loc_wep_MercuryAndAirToxicsStandardsMember_01a01bb4-02b5-71fc-b237-61473b989d10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NationalAmbientAirQualityStandardsMember_01a01bb4-02b5-7c78-b87f-9a3c79d00e80" xlink:href="wep-20260930.xsd#wep_NationalAmbientAirQualityStandardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_01a01bb4-02b5-72d5-b2f0-2594d178f81e" xlink:to="loc_wep_NationalAmbientAirQualityStandardsMember_01a01bb4-02b5-7c78-b87f-9a3c79d00e80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_ClimateChangeMember_01a01bb4-02b5-7835-abb7-eeebb475b792" xlink:href="wep-20260930.xsd#wep_ClimateChangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_01a01bb4-02b5-72d5-b2f0-2594d178f81e" xlink:to="loc_wep_ClimateChangeMember_01a01bb4-02b5-7835-abb7-eeebb475b792" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_ManufacturedGasPlantRemediationMember_01a01bb4-02b5-7b04-b2f0-5da0c1fc72d5" xlink:href="wep-20260930.xsd#wep_ManufacturedGasPlantRemediationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_01a01bb4-02b5-72d5-b2f0-2594d178f81e" xlink:to="loc_wep_ManufacturedGasPlantRemediationMember_01a01bb4-02b5-7b04-b2f0-5da0c1fc72d5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-7323-865e-587da802c70b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_01a01bb4-02b5-7aee-aa93-db205a11fb46" xlink:to="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-7323-865e-587da802c70b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7323-865e-587da802c70b_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-7323-865e-587da802c70b" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7323-865e-587da802c70b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7954-8ece-cf4a9d1ff080" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-7323-865e-587da802c70b" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7954-8ece-cf4a9d1ff080" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-02b5-7cc6-ab18-0888925e841a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ElectricityUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7954-8ece-cf4a9d1ff080" xlink:to="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-02b5-7cc6-ab18-0888925e841a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-02b5-7525-b346-6818b86a01ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NaturalGasUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7954-8ece-cf4a9d1ff080" xlink:to="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-02b5-7525-b346-6818b86a01ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-02b5-7b37-a525-631f6a3a0b57" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_01a01bb4-02b5-7aee-aa93-db205a11fb46" xlink:to="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-02b5-7b37-a525-631f6a3a0b57" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7b37-a525-631f6a3a0b57_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-02b5-7b37-a525-631f6a3a0b57" xlink:to="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7b37-a525-631f6a3a0b57_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7271-8565-deb1b99920b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAssetAxis_01a01bb4-02b5-7b37-a525-631f6a3a0b57" xlink:to="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7271-8565-deb1b99920b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRestorationCostsMember_01a01bb4-02b5-7d06-bfd7-4ff00e15252c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRestorationCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAssetDomain_01a01bb4-02b5-7271-8565-deb1b99920b1" xlink:to="loc_us-gaap_EnvironmentalRestorationCostsMember_01a01bb4-02b5-7d06-bfd7-4ff00e15252c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_01a01bb4-02b5-7f79-b16f-84d37f25eb91" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_01a01bb4-02b5-7aee-aa93-db205a11fb46" xlink:to="loc_srt_RangeAxis_01a01bb4-02b5-7f79-b16f-84d37f25eb91" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a01bb4-02b5-7f79-b16f-84d37f25eb91_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_01a01bb4-02b5-7f79-b16f-84d37f25eb91" xlink:to="loc_srt_RangeMember_01a01bb4-02b5-7f79-b16f-84d37f25eb91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a01bb4-02b5-7f18-a12c-466558223b1a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_01a01bb4-02b5-7f79-b16f-84d37f25eb91" xlink:to="loc_srt_RangeMember_01a01bb4-02b5-7f18-a12c-466558223b1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_01a01bb4-02b5-7b1b-9f6c-7a8ecc15458c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_01a01bb4-02b5-7f18-a12c-466558223b1a" xlink:to="loc_srt_MaximumMember_01a01bb4-02b5-7b1b-9f6c-7a8ecc15458c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_01a01bb4-02b5-7d33-a992-24ee7f0c8dd1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_01a01bb4-02b5-7f18-a12c-466558223b1a" xlink:to="loc_srt_MinimumMember_01a01bb4-02b5-7d33-a992-24ee7f0c8dd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:href="wep-20260930.xsd#wep_EnvironmentalComplianceObligationsAirQualityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_01a01bb4-02b5-747c-b84a-d89e01a4270a" xlink:to="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PreviousLevelOfParticulateMatterInPoundsPerMillionBritishThermalUnit_01a01bb4-02b5-7cac-8336-f5fe96817920" xlink:href="wep-20260930.xsd#wep_PreviousLevelOfParticulateMatterInPoundsPerMillionBritishThermalUnit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_PreviousLevelOfParticulateMatterInPoundsPerMillionBritishThermalUnit_01a01bb4-02b5-7cac-8336-f5fe96817920" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NewLimitForParticulateMatterPublishedInTheEPAsFinalRule_01a01bb4-02b5-7f01-9e18-d1ef8f2b1c3c" xlink:href="wep-20260930.xsd#wep_NewLimitForParticulateMatterPublishedInTheEPAsFinalRule"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_NewLimitForParticulateMatterPublishedInTheEPAsFinalRule_01a01bb4-02b5-7f01-9e18-d1ef8f2b1c3c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_LevelOfParticulateMatterInPoundsPerBritishThermalUnitsThatTheEPARevertedBackToWithTheRepealOfThe2024AmendmentsEffectiveApril272026_01a01bb4-02b5-79d5-813e-f7206bb62213" xlink:href="wep-20260930.xsd#wep_LevelOfParticulateMatterInPoundsPerBritishThermalUnitsThatTheEPARevertedBackToWithTheRepealOfThe2024AmendmentsEffectiveApril272026"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_LevelOfParticulateMatterInPoundsPerBritishThermalUnitsThatTheEPARevertedBackToWithTheRepealOfThe2024AmendmentsEffectiveApril272026_01a01bb4-02b5-79d5-813e-f7206bb62213" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NumberOfYearsBetweenEvaluationOfAttainmentStatus_01a01bb4-02b5-771b-9432-0cea6ceb911b" xlink:href="wep-20260930.xsd#wep_NumberOfYearsBetweenEvaluationOfAttainmentStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_NumberOfYearsBetweenEvaluationOfAttainmentStatus_01a01bb4-02b5-771b-9432-0cea6ceb911b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PreviousLevelOfMicrogramsPerCubicMeterUnder24HourStandardThatParticulateMatterNeededToBeBelow_01a01bb4-02b5-7f6e-8dc7-45b5b0d4f6ae" xlink:href="wep-20260930.xsd#wep_PreviousLevelOfMicrogramsPerCubicMeterUnder24HourStandardThatParticulateMatterNeededToBeBelow"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_PreviousLevelOfMicrogramsPerCubicMeterUnder24HourStandardThatParticulateMatterNeededToBeBelow_01a01bb4-02b5-7f6e-8dc7-45b5b0d4f6ae" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NewPrimaryAnnualPM2.5Level_01a01bb4-02b5-70a2-8392-f34cf124a9c5" xlink:href="wep-20260930.xsd#wep_NewPrimaryAnnualPM2.5Level"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_NewPrimaryAnnualPM2.5Level_01a01bb4-02b5-70a2-8392-f34cf124a9c5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NumberOfApplicableGHGPerformanceStandardsForCoalPlants_01a01bb4-02b5-7e4b-8f9a-d712e37404f0" xlink:href="wep-20260930.xsd#wep_NumberOfApplicableGHGPerformanceStandardsForCoalPlants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_NumberOfApplicableGHGPerformanceStandardsForCoalPlants_01a01bb4-02b5-7e4b-8f9a-d712e37404f0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NumberOfActionsIssuedForAddressingThe2024GHGPowerPlantRule_01a17a2f-4f6a-77ee-b5d2-52b0b0fea0ab" xlink:href="wep-20260930.xsd#wep_NumberOfActionsIssuedForAddressingThe2024GHGPowerPlantRule"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_NumberOfActionsIssuedForAddressingThe2024GHGPowerPlantRule_01a17a2f-4f6a-77ee-b5d2-52b0b0fea0ab" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_CoalGenerationCapacityRetired_01a01bb4-02b5-76f2-b71c-2aa9b01c4124" xlink:href="wep-20260930.xsd#wep_CoalGenerationCapacityRetired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsAirQualityAbstract_01a01bb4-02b5-7b03-9a43-6cd9a6e96353" xlink:to="loc_wep_CoalGenerationCapacityRetired_01a01bb4-02b5-76f2-b71c-2aa9b01c4124" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_EnvironmentalComplianceObligationsLandQualityAbstract_01a01bb4-02b5-788a-9f5d-11255aaae9f7" xlink:href="wep-20260930.xsd#wep_EnvironmentalComplianceObligationsLandQualityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_01a01bb4-02b5-747c-b84a-d89e01a4270a" xlink:to="loc_wep_EnvironmentalComplianceObligationsLandQualityAbstract_01a01bb4-02b5-788a-9f5d-11255aaae9f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationObligationsAbstract_01a01bb4-02b5-7de1-b7e6-d50d86ca7a3e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationObligationsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wep_EnvironmentalComplianceObligationsLandQualityAbstract_01a01bb4-02b5-788a-9f5d-11255aaae9f7" xlink:to="loc_us-gaap_EnvironmentalRemediationObligationsAbstract_01a01bb4-02b5-7de1-b7e6-d50d86ca7a3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssets_01a01bb4-02b5-7aa3-9fc6-1eebb1ee5eb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationObligationsAbstract_01a01bb4-02b5-7de1-b7e6-d50d86ca7a3e" xlink:to="loc_us-gaap_RegulatoryAssets_01a01bb4-02b5-7aa3-9fc6-1eebb1ee5eb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForEnvironmentalLossContingencies_01a01bb4-02b5-7f09-ba6e-3a74bd9c1ade" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccrualForEnvironmentalLossContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationObligationsAbstract_01a01bb4-02b5-7de1-b7e6-d50d86ca7a3e" xlink:to="loc_us-gaap_AccrualForEnvironmentalLossContingencies_01a01bb4-02b5-7f09-ba6e-3a74bd9c1ade" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/REGULATORYENVIRONMENT2027AND2028RATECASEDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#REGULATORYENVIRONMENT2027AND2028RATECASEDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/REGULATORYENVIRONMENT2027AND2028RATECASEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-76bb-a878-578f0449f144" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-76bb-a878-578f0449f144" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7e44-83f2-646f513172ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-76bb-a878-578f0449f144" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7e44-83f2-646f513172ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7e44-83f2-646f513172ec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7e44-83f2-646f513172ec" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7e44-83f2-646f513172ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7168-82cd-fdba986111b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7e44-83f2-646f513172ec" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7168-82cd-fdba986111b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PublicServiceCommissionOfWisconsinPSCWMember_01a01bb4-02b5-7963-ba4d-9d49cfd53dec" xlink:href="wep-20260930.xsd#wep_PublicServiceCommissionOfWisconsinPSCWMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7168-82cd-fdba986111b1" xlink:to="loc_wep_PublicServiceCommissionOfWisconsinPSCWMember_01a01bb4-02b5-7963-ba4d-9d49cfd53dec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-73a7-be4b-ef4ca8aa6d56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-76bb-a878-578f0449f144" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-73a7-be4b-ef4ca8aa6d56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-73a7-be4b-ef4ca8aa6d56_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-73a7-be4b-ef4ca8aa6d56" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-73a7-be4b-ef4ca8aa6d56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-789a-9a30-65b15e4201a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-73a7-be4b-ef4ca8aa6d56" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-789a-9a30-65b15e4201a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_A2027RatesMember_01a01bb4-02b5-75db-93dc-87576d32e9ec" xlink:href="wep-20260930.xsd#wep_A2027RatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-789a-9a30-65b15e4201a1" xlink:to="loc_wep_A2027RatesMember_01a01bb4-02b5-75db-93dc-87576d32e9ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_A2028RatesMember_01a01bb4-02b5-75a8-ae4b-85569d789926" xlink:href="wep-20260930.xsd#wep_A2028RatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-789a-9a30-65b15e4201a1" xlink:to="loc_wep_A2028RatesMember_01a01bb4-02b5-75a8-ae4b-85569d789926" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_A2027And2028RateCaseMember_01a01bb4-02b5-7a77-bf35-ad9e8a8572ee" xlink:href="wep-20260930.xsd#wep_A2027And2028RateCaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-789a-9a30-65b15e4201a1" xlink:to="loc_wep_A2027And2028RateCaseMember_01a01bb4-02b5-7a77-bf35-ad9e8a8572ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-714b-ab77-a888107a2f36" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-76bb-a878-578f0449f144" xlink:to="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-714b-ab77-a888107a2f36" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-714b-ab77-a888107a2f36_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-714b-ab77-a888107a2f36" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-714b-ab77-a888107a2f36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7159-a8ba-7b2a8649e709" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_01a01bb4-02b5-714b-ab77-a888107a2f36" xlink:to="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7159-a8ba-7b2a8649e709" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-02b5-7b55-9ba3-c06133e11087" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ElectricityUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7159-a8ba-7b2a8649e709" xlink:to="loc_us-gaap_ElectricityUsRegulatedMember_01a01bb4-02b5-7b55-9ba3-c06133e11087" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-02b5-7562-a6d3-cff86803b8ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NaturalGasUsRegulatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7159-a8ba-7b2a8649e709" xlink:to="loc_us-gaap_NaturalGasUsRegulatedMember_01a01bb4-02b5-7562-a6d3-cff86803b8ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_SteamRateRequestMember_01a01bb4-02b5-7fc0-b4fe-59181dcdb922" xlink:href="wep-20260930.xsd#wep_SteamRateRequestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_01a01bb4-02b5-7159-a8ba-7b2a8649e709" xlink:to="loc_wep_SteamRateRequestMember_01a01bb4-02b5-7fc0-b4fe-59181dcdb922" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount_01a01bb4-02b5-7b02-9ccd-d3b4f2603f83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount_01a01bb4-02b5-7b02-9ccd-d3b4f2603f83" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreasePercentage_01a01bb4-02b5-7c0e-8ab8-90d6c7180f83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRequestedRateIncreaseDecreasePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreasePercentage_01a01bb4-02b5-7c0e-8ab8-90d6c7180f83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage_01a01bb4-02b5-7a79-b196-11cea255627d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage_01a01bb4-02b5-7a79-b196-11cea255627d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage_01a01bb4-02b5-779e-85d0-6f53fa2406bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage_01a01bb4-02b5-779e-85d0-6f53fa2406bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PercentageOfFirst15BasisPointsOfAdditionalEarningsRetainedByTheUtility_01a01bb4-02b5-779f-9c85-eac20a09f886" xlink:href="wep-20260930.xsd#wep_PercentageOfFirst15BasisPointsOfAdditionalEarningsRetainedByTheUtility"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_wep_PercentageOfFirst15BasisPointsOfAdditionalEarningsRetainedByTheUtility_01a01bb4-02b5-779f-9c85-eac20a09f886" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_Returnonequityinexcessofauthorizedamountasapercent_01a01bb4-02b5-7024-bc0a-e2f4342b4fbb" xlink:href="wep-20260930.xsd#wep_Returnonequityinexcessofauthorizedamountasapercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_wep_Returnonequityinexcessofauthorizedamountasapercent_01a01bb4-02b5-7024-bc0a-e2f4342b4fbb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PercentageOfAdditionalEarningsBetween15And40BasisPointsRefundedToCustomers_01a01bb4-02b5-7b57-8ef0-a6302c6a5e64" xlink:href="wep-20260930.xsd#wep_PercentageOfAdditionalEarningsBetween15And40BasisPointsRefundedToCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_wep_PercentageOfAdditionalEarningsBetween15And40BasisPointsRefundedToCustomers_01a01bb4-02b5-7b57-8ef0-a6302c6a5e64" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_ReturnOnEquityInExcessOfFirst15BasisPointsAboveAuthorizedAmountAsAPercent_01a01bb4-02b5-7a67-852c-e92aa19661de" xlink:href="wep-20260930.xsd#wep_ReturnOnEquityInExcessOfFirst15BasisPointsAboveAuthorizedAmountAsAPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_wep_ReturnOnEquityInExcessOfFirst15BasisPointsAboveAuthorizedAmountAsAPercent_01a01bb4-02b5-7a67-852c-e92aa19661de" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PercentageOfEarningsInExcessOf40BasisPointsRefundedToCustomers_01a01bb4-02b5-7e45-b951-216d1120e118" xlink:href="wep-20260930.xsd#wep_PercentageOfEarningsInExcessOf40BasisPointsRefundedToCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-7424-a5a2-e53d7728cf04" xlink:to="loc_wep_PercentageOfEarningsInExcessOf40BasisPointsRefundedToCustomers_01a01bb4-02b5-7e45-b951-216d1120e118" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.wecenergygroup.com/role/REGULATORYENVIRONMENTVLCANDBESPOKERESOURCESTARIFFSDetails" xlink:type="simple" xlink:href="wep-20260930.xsd#REGULATORYENVIRONMENTVLCANDBESPOKERESOURCESTARIFFSDetails"/>
  <link:definitionLink xlink:role="http://www.wecenergygroup.com/role/REGULATORYENVIRONMENTVLCANDBESPOKERESOURCESTARIFFSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7233-a728-b31dec3d0657" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7233-a728-b31dec3d0657" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7b69-aba1-79b305562944" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7233-a728-b31dec3d0657" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7b69-aba1-79b305562944" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7b69-aba1-79b305562944_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7b69-aba1-79b305562944" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-7b69-aba1-79b305562944_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-704d-ae42-e716364ca7a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_01a01bb4-02b5-7b69-aba1-79b305562944" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-704d-ae42-e716364ca7a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_PublicServiceCommissionOfWisconsinPSCWMember_01a01bb4-02b5-729c-92ba-850948c43393" xlink:href="wep-20260930.xsd#wep_PublicServiceCommissionOfWisconsinPSCWMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_01a01bb4-02b5-704d-ae42-e716364ca7a9" xlink:to="loc_wep_PublicServiceCommissionOfWisconsinPSCWMember_01a01bb4-02b5-729c-92ba-850948c43393" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-7ce5-afd5-ba62b3d088a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7233-a728-b31dec3d0657" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-7ce5-afd5-ba62b3d088a2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-7ce5-afd5-ba62b3d088a2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-7ce5-afd5-ba62b3d088a2" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-7ce5-afd5-ba62b3d088a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-73cc-8266-3a48663c2b1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_01a01bb4-02b5-7ce5-afd5-ba62b3d088a2" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-73cc-8266-3a48663c2b1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_VeryLargeCustomerAndBespokeResourcesTariffsMember_01a01bb4-02b5-7099-9cbd-78237b78b422" xlink:href="wep-20260930.xsd#wep_VeryLargeCustomerAndBespokeResourcesTariffsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_01a01bb4-02b5-73cc-8266-3a48663c2b1b" xlink:to="loc_wep_VeryLargeCustomerAndBespokeResourcesTariffsMember_01a01bb4-02b5-7099-9cbd-78237b78b422" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_01a01bb4-02b5-782a-9608-e01d1cc92ec9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_01a01bb4-02b5-7233-a728-b31dec3d0657" xlink:to="loc_srt_RangeAxis_01a01bb4-02b5-782a-9608-e01d1cc92ec9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a01bb4-02b5-782a-9608-e01d1cc92ec9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_01a01bb4-02b5-782a-9608-e01d1cc92ec9" xlink:to="loc_srt_RangeMember_01a01bb4-02b5-782a-9608-e01d1cc92ec9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a01bb4-02b5-7282-b94f-e9dcfc9d955e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_01a01bb4-02b5-782a-9608-e01d1cc92ec9" xlink:to="loc_srt_RangeMember_01a01bb4-02b5-7282-b94f-e9dcfc9d955e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_01a01bb4-02b5-7e31-8304-42613d8bb07f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_01a01bb4-02b5-7282-b94f-e9dcfc9d955e" xlink:to="loc_srt_MinimumMember_01a01bb4-02b5-7e31-8304-42613d8bb07f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_01a01bb4-02b5-7e23-a128-5d21eaf4280d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_01a01bb4-02b5-7282-b94f-e9dcfc9d955e" xlink:to="loc_srt_MaximumMember_01a01bb4-02b5-7e23-a128-5d21eaf4280d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_MinimumMegawattsRequiredForVLCs_01a01bb4-02b5-7023-b010-f14fde6b9662" xlink:href="wep-20260930.xsd#wep_MinimumMegawattsRequiredForVLCs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_wep_MinimumMegawattsRequiredForVLCs_01a01bb4-02b5-7023-b010-f14fde6b9662" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NumberOfNewTariffs_01a01bb4-02b5-7299-9b01-6bb5d41bf477" xlink:href="wep-20260930.xsd#wep_NumberOfNewTariffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_wep_NumberOfNewTariffs_01a01bb4-02b5-7299-9b01-6bb5d41bf477" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_MinimumNumberOfBespokeResources_01a01bb4-02b5-7c86-95fe-0213c3c9e25b" xlink:href="wep-20260930.xsd#wep_MinimumNumberOfBespokeResources"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_wep_MinimumNumberOfBespokeResources_01a01bb4-02b5-7c86-95fe-0213c3c9e25b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TermOfServiceAgreementsForWindAndSolarResources_01a01bb4-02b5-7343-b975-bf4c3a2d03af" xlink:href="wep-20260930.xsd#wep_TermOfServiceAgreementsForWindAndSolarResources"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_wep_TermOfServiceAgreementsForWindAndSolarResources_01a01bb4-02b5-7343-b975-bf4c3a2d03af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_01a01bb4-02b5-7a05-9c0c-f1d1c17e59a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_01a01bb4-02b5-7a05-9c0c-f1d1c17e59a2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesApprovedEquityCapitalStructurePercentage_01a01bb4-02b5-7ccc-a2e0-0e0419abaed2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesApprovedEquityCapitalStructurePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_us-gaap_PublicUtilitiesApprovedEquityCapitalStructurePercentage_01a01bb4-02b5-7ccc-a2e0-0e0419abaed2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_NumberOfIntervenorsThatFiledForRehearing_01a01bb4-02b5-7292-b87b-7b4c3fdf427f" xlink:href="wep-20260930.xsd#wep_NumberOfIntervenorsThatFiledForRehearing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_wep_NumberOfIntervenorsThatFiledForRehearing_01a01bb4-02b5-7292-b87b-7b4c3fdf427f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wep_TimePeriodForPSCWToTakeAction_01a01bb4-02b5-7b9f-8b2f-c4d5fb06176d" xlink:href="wep-20260930.xsd#wep_TimePeriodForPSCWToTakeAction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_01a01bb4-02b5-73c1-84eb-d5908dc9c39c" xlink:to="loc_wep_TimePeriodForPSCWToTakeAction_01a01bb4-02b5-7b9f-8b2f-c4d5fb06176d" xlink:type="arc" order="7"/>
  </link:definitionLink>
</link:linkbase>
