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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019f4278-17cb-7eb5-a567-d9d5c657f398,g:ad64f9b8-ebb7-4d8a-b501-5fac21ebc5cb-->
<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://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SeriesOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_S000071248Member_019f5c1e-aad3-7378-ad8c-5769412869ba" xlink:href="ck0001771146-20260729.xsd#ck0001771146_S000071248Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain" xlink:to="loc_ck0001771146_S000071248Member_019f5c1e-aad3-7378-ad8c-5769412869ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_S000071249Member_019f5c78-312a-7186-a1a9-efed4a6153f3" xlink:href="ck0001771146-20260729.xsd#ck0001771146_S000071249Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain" xlink:to="loc_ck0001771146_S000071249Member_019f5c78-312a-7186-a1a9-efed4a6153f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_S000071250Member_019f5f7c-e368-7e95-9b8f-8f63163ffafc" xlink:href="ck0001771146-20260729.xsd#ck0001771146_S000071250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain" xlink:to="loc_ck0001771146_S000071250Member_019f5f7c-e368-7e95-9b8f-8f63163ffafc" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oef_ShareClassDomain" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_C000226143Member_019f5c21-6f9c-7753-be41-7b5fd94e69ec" xlink:href="ck0001771146-20260729.xsd#ck0001771146_C000226143Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_ShareClassDomain" xlink:to="loc_ck0001771146_C000226143Member_019f5c21-6f9c-7753-be41-7b5fd94e69ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_S000071248Member_019f5c1e-aad3-7378-ad8c-5769412869ba" xlink:href="ck0001771146-20260729.xsd#ck0001771146_S000071248Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_ShareClassDomain" xlink:to="loc_ck0001771146_S000071248Member_019f5c1e-aad3-7378-ad8c-5769412869ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_C000226144Member_019f5c79-c0d6-7491-8c79-ff2951b26c0b" xlink:href="ck0001771146-20260729.xsd#ck0001771146_C000226144Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_ShareClassDomain" xlink:to="loc_ck0001771146_C000226144Member_019f5c79-c0d6-7491-8c79-ff2951b26c0b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_C000226145Member_019f5f7f-3fee-7775-ade0-263d84ea92a7" xlink:href="ck0001771146-20260729.xsd#ck0001771146_C000226145Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_ShareClassDomain" xlink:to="loc_ck0001771146_C000226145Member_019f5f7f-3fee-7775-ade0-263d84ea92a7" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#RiskOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oef_AllRisksMember" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_EquitySecuritiesRiskMember_019f5b1f-0715-7447-9a7f-f3206133fb18" xlink:href="ck0001771146-20260729.xsd#ck0001771146_EquitySecuritiesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_EquitySecuritiesRiskMember_019f5b1f-0715-7447-9a7f-f3206133fb18" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_MarketRiskMember_019f5b1f-634f-7809-8710-c4b08fc4656f" xlink:href="ck0001771146-20260729.xsd#ck0001771146_MarketRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_MarketRiskMember_019f5b1f-634f-7809-8710-c4b08fc4656f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ActiveManagementRiskMember_019f5b75-ca90-7faa-ab5a-198fdd9f1f9d" xlink:href="ck0001771146-20260729.xsd#ck0001771146_ActiveManagementRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ActiveManagementRiskMember_019f5b75-ca90-7faa-ab5a-198fdd9f1f9d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_RiskOfOtherEquitySecuritiesMember_019f5b76-5561-7fe6-bb05-0acf1bd115d1" xlink:href="ck0001771146-20260729.xsd#ck0001771146_RiskOfOtherEquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_RiskOfOtherEquitySecuritiesMember_019f5b76-5561-7fe6-bb05-0acf1bd115d1" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_RiskOfOtherEquitySecuritiesPreferredSecuritiesMember_019f604e-d114-705a-9e69-4a2ad3148d07" xlink:href="ck0001771146-20260729.xsd#ck0001771146_RiskOfOtherEquitySecuritiesPreferredSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_RiskOfOtherEquitySecuritiesPreferredSecuritiesMember_019f604e-d114-705a-9e69-4a2ad3148d07" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_RiskOfOtherEquitySecuritiesRightsAndWarrantsMember_019f604f-86c4-7e32-a6e5-3c72c40ec384" xlink:href="ck0001771146-20260729.xsd#ck0001771146_RiskOfOtherEquitySecuritiesRightsAndWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_RiskOfOtherEquitySecuritiesRightsAndWarrantsMember_019f604f-86c4-7e32-a6e5-3c72c40ec384" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFStructureRiskMember_019f5b78-18fb-7278-9dad-b05215a77b07" xlink:href="ck0001771146-20260729.xsd#ck0001771146_ETFStructureRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFStructureRiskMember_019f5b78-18fb-7278-9dad-b05215a77b07" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFStructureRiskTradingIssuesRiskMember_019f5b79-5fbe-7510-89ea-a16ad89811ca" xlink:href="ck0001771146-20260729.xsd#ck0001771146_ETFStructureRiskTradingIssuesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFStructureRiskTradingIssuesRiskMember_019f5b79-5fbe-7510-89ea-a16ad89811ca" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFStructureRiskMarketPriceVarianceRiskMember_019f5b7a-0b6c-7218-aa62-d4c1804a9f6d" xlink:href="ck0001771146-20260729.xsd#ck0001771146_ETFStructureRiskMarketPriceVarianceRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFStructureRiskMarketPriceVarianceRiskMember_019f5b7a-0b6c-7218-aa62-d4c1804a9f6d" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFStructureRiskAuthorizedParticipantsAPsMarketMakersAndLiquidityProvidersRiskMember_019f5b7a-fc33-793f-9932-d0bda8b35dea" xlink:href="ck0001771146-20260729.xsd#ck0001771146_ETFStructureRiskAuthorizedParticipantsAPsMarketMakersAndLiquidityProvidersRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFStructureRiskAuthorizedParticipantsAPsMarketMakersAndLiquidityProvidersRiskMember_019f5b7a-fc33-793f-9932-d0bda8b35dea" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETFStructureRiskCostsOfBuyingOrSellingSharesOfTheFundMember_019f5b7b-84c2-7347-a906-01dd1a21277e" xlink:href="ck0001771146-20260729.xsd#ck0001771146_ETFStructureRiskCostsOfBuyingOrSellingSharesOfTheFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETFStructureRiskCostsOfBuyingOrSellingSharesOfTheFundMember_019f5b7b-84c2-7347-a906-01dd1a21277e" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_InvestmentCompanyRiskMember_019f5b7c-0871-74b7-86db-858dcb574327" xlink:href="ck0001771146-20260729.xsd#ck0001771146_InvestmentCompanyRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_InvestmentCompanyRiskMember_019f5b7c-0871-74b7-86db-858dcb574327" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_DerivativesRiskMember_019f5b7c-80d7-71cc-9c29-52e763a7c65d" xlink:href="ck0001771146-20260729.xsd#ck0001771146_DerivativesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_DerivativesRiskMember_019f5b7c-80d7-71cc-9c29-52e763a7c65d" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_OptionsRiskMember_019f5b7c-e5b4-7522-869e-8d61ba4744f4" xlink:href="ck0001771146-20260729.xsd#ck0001771146_OptionsRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_OptionsRiskMember_019f5b7c-e5b4-7522-869e-8d61ba4744f4" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_FLEXOptionsRiskMember_019f5b7d-6b6d-7a37-8d08-b637d6e10850" xlink:href="ck0001771146-20260729.xsd#ck0001771146_FLEXOptionsRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_FLEXOptionsRiskMember_019f5b7d-6b6d-7a37-8d08-b637d6e10850" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_LargeCapitalizationSecuritiesRiskMember_019f5b7d-e047-7ebf-b5f8-d2d2a03a7d7a" xlink:href="ck0001771146-20260729.xsd#ck0001771146_LargeCapitalizationSecuritiesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_LargeCapitalizationSecuritiesRiskMember_019f5b7d-e047-7ebf-b5f8-d2d2a03a7d7a" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_MidAndSmallCapitalizationStockRiskMember_019f5b7e-5820-7dae-ac59-31222bf850c6" xlink:href="ck0001771146-20260729.xsd#ck0001771146_MidAndSmallCapitalizationStockRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_MidAndSmallCapitalizationStockRiskMember_019f5b7e-5820-7dae-ac59-31222bf850c6" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ForeignSecuritiesRiskMember_019f5b7e-d212-7073-9657-0aac0a9d3de0" xlink:href="ck0001771146-20260729.xsd#ck0001771146_ForeignSecuritiesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ForeignSecuritiesRiskMember_019f5b7e-d212-7073-9657-0aac0a9d3de0" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_LeverageRiskMember_019f5b7f-66a8-7270-8aaa-c55a070b6159" xlink:href="ck0001771146-20260729.xsd#ck0001771146_LeverageRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_LeverageRiskMember_019f5b7f-66a8-7270-8aaa-c55a070b6159" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_IssuerNonDiversificationRiskMember_019f5b7f-e5ab-75d0-a54d-9a0e3f830e3b" xlink:href="ck0001771146-20260729.xsd#ck0001771146_IssuerNonDiversificationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_IssuerNonDiversificationRiskMember_019f5b7f-e5ab-75d0-a54d-9a0e3f830e3b" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_InvestmentStrategyRiskMember_019f5b80-57ad-7195-a528-2b947c7eb1e3" xlink:href="ck0001771146-20260729.xsd#ck0001771146_InvestmentStrategyRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_InvestmentStrategyRiskMember_019f5b80-57ad-7195-a528-2b947c7eb1e3" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_InvestmentRiskMember_019f5b98-4c30-743d-8e44-c8ba160dff56" xlink:href="ck0001771146-20260729.xsd#ck0001771146_InvestmentRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_InvestmentRiskMember_019f5b98-4c30-743d-8e44-c8ba160dff56" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_REITsMember_019f5b99-608f-7b2c-9170-61cda34f582c" xlink:href="ck0001771146-20260729.xsd#ck0001771146_REITsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_REITsMember_019f5b99-608f-7b2c-9170-61cda34f582c" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_ETNRiskMember_019f5ba1-8cac-742e-b7c8-370846375e15" xlink:href="ck0001771146-20260729.xsd#ck0001771146_ETNRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_ETNRiskMember_019f5ba1-8cac-742e-b7c8-370846375e15" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_DepositaryReceiptsMember_019f5ba2-030b-793c-b710-4f6edcc3bc24" xlink:href="ck0001771146-20260729.xsd#ck0001771146_DepositaryReceiptsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_DepositaryReceiptsMember_019f5ba2-030b-793c-b710-4f6edcc3bc24" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_RiskOfHighlyVolatileMarketsMember_019f5ba2-a906-72fa-8baf-0516ce7d89f7" xlink:href="ck0001771146-20260729.xsd#ck0001771146_RiskOfHighlyVolatileMarketsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_RiskOfHighlyVolatileMarketsMember_019f5ba2-a906-72fa-8baf-0516ce7d89f7" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_LiquidityRiskMember_019f5ba3-07d9-7e2f-a294-c091488a3994" xlink:href="ck0001771146-20260729.xsd#ck0001771146_LiquidityRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_LiquidityRiskMember_019f5ba3-07d9-7e2f-a294-c091488a3994" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_RightsAndWarrantsRiskMember_019f5c6b-5e3f-7298-a042-1eaa2a7a098b" xlink:href="ck0001771146-20260729.xsd#ck0001771146_RightsAndWarrantsRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_RightsAndWarrantsRiskMember_019f5c6b-5e3f-7298-a042-1eaa2a7a098b" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_MidCapitalizationStockRiskMember_019f5c6e-225b-7fcf-8ce2-7d416c38c71d" xlink:href="ck0001771146-20260729.xsd#ck0001771146_MidCapitalizationStockRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_MidCapitalizationStockRiskMember_019f5c6e-225b-7fcf-8ce2-7d416c38c71d" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_NewFundRiskMember_019f5c72-30fd-738e-b111-dfb0ba8a133d" xlink:href="ck0001771146-20260729.xsd#ck0001771146_NewFundRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001771146_NewFundRiskMember_019f5c72-30fd-738e-b111-dfb0ba8a133d" xlink:type="arc" order="38"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#PerformanceMeasureOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oef_PerformanceMeasureDomain" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_SAndP500IndexInceptionDatedOnApril292021IndexMember_019f6122-283b-71b6-ba5b-635998053abe" xlink:href="ck0001771146-20260729.xsd#ck0001771146_SAndP500IndexInceptionDatedOnApril292021IndexMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_PerformanceMeasureDomain" xlink:to="loc_ck0001771146_SAndP500IndexInceptionDatedOnApril292021IndexMember_019f6122-283b-71b6-ba5b-635998053abe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001771146_SAndP500IndexInceptionDatedOnJuly212021IndexMember_019f5c18-8a9d-704c-871d-6faff4312d12" xlink:href="ck0001771146-20260729.xsd#ck0001771146_SAndP500IndexInceptionDatedOnJuly212021IndexMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_PerformanceMeasureDomain" xlink:to="loc_ck0001771146_SAndP500IndexInceptionDatedOnJuly212021IndexMember_019f5c18-8a9d-704c-871d-6faff4312d12" xlink:type="arc" order="4"/>
  </link:definitionLink>
</link:linkbase>
