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            <link:definition>Role for anchoring relationships</link:definition>
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            <link:definition>[901000] Axis - Retrospective application and retrospective restatement</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
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        <link:roleType id="id_3" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs-dim_role-901100">
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            <link:definition>[901500] Axis - Creation date</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
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            <link:definition>[903000] Axis - Continuing and discontinued operations</link:definition>
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            <link:definition>[904000] Axis - Assets and liabilities classified as held for sale</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:definition>[913000] Axis - Consolidated and separate financial statements</link:definition>
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            <link:definition>[914000] Axis - Currency in which information is displayed</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
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            <link:definition>[915000] Axis - Cumulative effect at date of initial application</link:definition>
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            <link:definition>[310000] Statement of comprehensive income, profit or loss, by function of expense</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:definition>[320000] Statement of comprehensive income, profit or loss, by nature of expense</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_12" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-610000">
            <link:definition>[610000] Statement of changes in equity</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
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            <link:definition>[800200] Analysis of income and expense</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:definition>[810000] Notes - Corporate information and statement of IFRS compliance</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:definition>[810000a] Notes - Corporate information and statement of IFRS compliance</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_16" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-810000b">
            <link:definition>[810000b] Notes - Corporate information and statement of IFRS compliance</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_17" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-810000c">
            <link:definition>[810000c] Notes - Corporate information and statement of IFRS compliance</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_18" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-861000">
            <link:definition>[861000] Notes - Analysis of other comprehensive income by item</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_19" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-861200a">
            <link:definition>[861200a] Notes - Share capital, reserves and other equity interest</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_20" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-861200b">
            <link:definition>[861200b] Notes - Share capital, reserves and other equity interest</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_21" roleURI="https://www.a2a.eu/xbrl/role/all/ias_10_role-815000">
            <link:definition>[815000] Notes - Events after reporting period</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_22" roleURI="https://www.a2a.eu/xbrl/role/all/ias_12_role-835110">
            <link:definition>[835110] Notes - Income taxes</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_23" roleURI="https://www.a2a.eu/xbrl/role/all/ias_16_role-822100">
            <link:definition>[822100] Notes - Property, plant and equipment</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_24" roleURI="https://www.a2a.eu/xbrl/role/all/ias_19_role-834480">
            <link:definition>[834480] Notes - Employee benefits</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_25" roleURI="https://www.a2a.eu/xbrl/role/all/ias_19_role-834480a">
            <link:definition>[834480a] Notes - Employee benefits</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_26" roleURI="https://www.a2a.eu/xbrl/role/all/ias_19_role-834480b">
            <link:definition>[834480b] Notes - Employee benefits</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_27" roleURI="https://www.a2a.eu/xbrl/role/all/ias_19_role-834480c">
            <link:definition>[834480c] Notes - Employee benefits</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_28" roleURI="https://www.a2a.eu/xbrl/role/all/ias_19_role-834480d">
            <link:definition>[834480d] Notes - Employee benefits</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_29" roleURI="https://www.a2a.eu/xbrl/role/all/ias_24_role-818000">
            <link:definition>[818000] Notes - Related party</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_30" roleURI="https://www.a2a.eu/xbrl/role/all/ias_24_role-818000a">
            <link:definition>[818000a] Notes - Related party</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_31" roleURI="https://www.a2a.eu/xbrl/role/all/ias_27_role-825480">
            <link:definition>[825480] Notes - Separate financial statements</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_32" roleURI="https://www.a2a.eu/xbrl/role/all/ias_27_role-825480a">
            <link:definition>[825480a] Notes - Separate financial statements</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_33" roleURI="https://www.a2a.eu/xbrl/role/all/ias_27_role-825480c">
            <link:definition>[825480c] Notes - Separate financial statements</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_34" roleURI="https://www.a2a.eu/xbrl/role/all/ias_33_role-838000">
            <link:definition>[838000] Notes - Earnings per share</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_35" roleURI="https://www.a2a.eu/xbrl/role/all/ias_33_role-838000a">
            <link:definition>[838000a] Notes - Earnings per share</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_36" roleURI="https://www.a2a.eu/xbrl/role/all/ias_36_role-832410a">
            <link:definition>[832410a] Notes - Impairment of assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_37" roleURI="https://www.a2a.eu/xbrl/role/all/ias_36_role-832410b">
            <link:definition>[832410b] Notes - Impairment of assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_38" roleURI="https://www.a2a.eu/xbrl/role/all/ias_36_role-832410c">
            <link:definition>[832410c] Notes - Impairment of assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_39" roleURI="https://www.a2a.eu/xbrl/role/all/ias_36_role-832410d">
            <link:definition>[832410d] Notes - Impairment of assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_40" roleURI="https://www.a2a.eu/xbrl/role/all/ias_37_role-827570a">
            <link:definition>[827570a] Notes - Other provisions, contingent liabilities and contingent assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_41" roleURI="https://www.a2a.eu/xbrl/role/all/ias_37_role-827570b">
            <link:definition>[827570b] Notes - Other provisions, contingent liabilities and contingent assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_42" roleURI="https://www.a2a.eu/xbrl/role/all/ias_38_role-823180">
            <link:definition>[823180] Notes - Intangible assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_43" roleURI="https://www.a2a.eu/xbrl/role/all/ias_38_role-823180a">
            <link:definition>[823180a] Notes - Intangible assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_44" roleURI="https://www.a2a.eu/xbrl/role/all/ias_38_role-823180b">
            <link:definition>[823180b] Notes - Intangible assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_45" roleURI="https://www.a2a.eu/xbrl/role/all/ias_38_role-823180c">
            <link:definition>[823180c] Notes - Intangible assets</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_46" roleURI="https://www.a2a.eu/xbrl/role/all/ias_40_role-825100">
            <link:definition>[825100] Notes - Investment property</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_47" roleURI="https://www.a2a.eu/xbrl/role/all/ias_41_role-824180">
            <link:definition>[824180] Notes - Agriculture</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_48" roleURI="https://www.a2a.eu/xbrl/role/all/ias_41_role-824180a">
            <link:definition>[824180a] Notes - Agriculture</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_49" roleURI="https://www.a2a.eu/xbrl/role/all/ias_41_role-824180b">
            <link:definition>[824180b] Notes - Agriculture</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_50" roleURI="https://www.a2a.eu/xbrl/role/all/ias_7_role-851100">
            <link:definition>[851100] Notes - Cash flow statement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:definition>[811000] Notes - Accounting policies, changes in accounting estimates and errors</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_52" roleURI="https://www.a2a.eu/xbrl/role/all/ias_8_role-811000a">
            <link:definition>[811000a] Notes - Accounting policies, changes in accounting estimates and errors</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_53" roleURI="https://www.a2a.eu/xbrl/role/all/ias_8_role-811000b">
            <link:definition>[811000b] Notes - Accounting policies, changes in accounting estimates and errors</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_54" roleURI="https://www.a2a.eu/xbrl/role/all/ias_8_role-811000c">
            <link:definition>[811000c] Notes - Accounting policies, changes in accounting estimates and errors</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_55" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_1_role-819100a">
            <link:definition>[819100a] Notes - First time adoption</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_56" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_1_role-819100b">
            <link:definition>[819100b] Notes - First time adoption</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_57" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_1_role-819100c">
            <link:definition>[819100c] Notes - First time adoption</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_58" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_12_role-825700">
            <link:definition>[825700] Notes - Interests in other entities</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_59" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_12_role-825700a">
            <link:definition>[825700a] Notes - Interests in other entities</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_60" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_12_role-825700b">
            <link:definition>[825700b] Notes - Interests in other entities</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_61" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_12_role-825700c">
            <link:definition>[825700c] Notes - Interests in other entities</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_62" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_12_role-825700d">
            <link:definition>[825700d] Notes - Interests in other entities</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_63" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_12_role-825700e">
            <link:definition>[825700e] Notes - Interests in other entities</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_64" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_12_role-825700f">
            <link:definition>[825700f] Notes - Interests in other entities</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_65" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_12_role-825700g">
            <link:definition>[825700g] Notes - Interests in other entities</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_66" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000">
            <link:definition>[823000] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_67" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000a">
            <link:definition>[823000a] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_68" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000b">
            <link:definition>[823000b] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_69" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000c">
            <link:definition>[823000c] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_70" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000d">
            <link:definition>[823000d] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_71" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000e">
            <link:definition>[823000e] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_72" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000f">
            <link:definition>[823000f] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_73" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000g">
            <link:definition>[823000g] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_74" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000h">
            <link:definition>[823000h] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_75" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_13_role-823000i">
            <link:definition>[823000i] Notes - Fair value measurement</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_76" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_14_role-824500">
            <link:definition>[824500] Notes - Regulatory deferral accounts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_77" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_14_role-824500a">
            <link:definition>[824500a] Notes - Regulatory deferral accounts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_78" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_15_role-831150">
            <link:definition>[831150] Notes - Revenue from contracts with customers</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_79" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_15_role-831150a">
            <link:definition>[831150a] Notes - Revenue from contracts with customers</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_80" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_15_role-831150b">
            <link:definition>[831150b] Notes - Revenue from contracts with customers</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_81" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_15_role-831150c">
            <link:definition>[831150c] Notes - Revenue from contracts with customers</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_82" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_16_role-832610">
            <link:definition>[832610] Notes - Leases</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_83" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_16_role-832610a">
            <link:definition>[832610a] Notes - Leases</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_84" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_16_role-832610b">
            <link:definition>[832610b] Notes - Leases</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_85" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600">
            <link:definition>[836600] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_86" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600a">
            <link:definition>[836600a] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_87" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600b">
            <link:definition>[836600b] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_88" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600c">
            <link:definition>[836600c] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_89" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600d">
            <link:definition>[836600d] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_90" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600e">
            <link:definition>[836600e] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_91" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600f">
            <link:definition>[836600f] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_92" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600g">
            <link:definition>[836600g] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_93" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600h">
            <link:definition>[836600h] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_94" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600i">
            <link:definition>[836600i] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_95" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600j">
            <link:definition>[836600j] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_96" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600k">
            <link:definition>[836600k] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_97" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600l">
            <link:definition>[836600l] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_98" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600m">
            <link:definition>[836600m] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_99" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600n">
            <link:definition>[836600n] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_100" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_17_role-836600o">
            <link:definition>[836600o] Notes - Insurance contracts (IFRS 17)</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_101" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_2_role-834120a">
            <link:definition>[834120a] Notes - Share-based payment arrangements</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_102" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_2_role-834120b">
            <link:definition>[834120b] Notes - Share-based payment arrangements</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_103" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_2_role-834120c">
            <link:definition>[834120c] Notes - Share-based payment arrangements</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_104" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_3_role-817000">
            <link:definition>[817000] Notes - Business combinations</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_105" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_3_role-817000a">
            <link:definition>[817000a] Notes - Business combinations</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_106" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_3_role-817000b">
            <link:definition>[817000b] Notes - Business combinations</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_107" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_3_role-817000c">
            <link:definition>[817000c] Notes - Business combinations</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_108" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_3_role-817000d">
            <link:definition>[817000d] Notes - Business combinations</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_109" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500">
            <link:definition>[836500] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_110" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500a">
            <link:definition>[836500a] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_111" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500b">
            <link:definition>[836500b] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_112" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500c">
            <link:definition>[836500c] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_113" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500d">
            <link:definition>[836500d] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_114" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500e">
            <link:definition>[836500e] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_115" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500f">
            <link:definition>[836500f] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_116" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500g">
            <link:definition>[836500g] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_117" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500h">
            <link:definition>[836500h] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_118" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500i">
            <link:definition>[836500i] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_119" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500j">
            <link:definition>[836500j] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_120" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500k">
            <link:definition>[836500k] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_121" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500l">
            <link:definition>[836500l] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_122" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500m">
            <link:definition>[836500m] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_123" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_4_role-836500n">
            <link:definition>[836500n] Notes - Insurance contracts</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_124" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_5_role-825900">
            <link:definition>[825900] Notes - Non-current asset held for sale and discontinued operations</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_125" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390a">
            <link:definition>[822390a] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_126" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390b">
            <link:definition>[822390b] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_127" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390c">
            <link:definition>[822390c] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_128" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390d">
            <link:definition>[822390d] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_129" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390e">
            <link:definition>[822390e] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_130" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390f">
            <link:definition>[822390f] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_131" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390g">
            <link:definition>[822390g] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_132" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390h">
            <link:definition>[822390h] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_133" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390i">
            <link:definition>[822390i] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_134" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390j">
            <link:definition>[822390j] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_135" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390k">
            <link:definition>[822390k] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_136" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390l">
            <link:definition>[822390l] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_137" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390m">
            <link:definition>[822390m] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_138" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390n">
            <link:definition>[822390n] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_139" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390o">
            <link:definition>[822390o] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_140" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390p">
            <link:definition>[822390p] Notes - Financial Instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_141" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390q">
            <link:definition>[822390q] Notes - Financial Instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_142" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390r">
            <link:definition>[822390r] Notes - Financial Instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_143" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390s">
            <link:definition>[822390s] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_144" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390t">
            <link:definition>[822390t] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_145" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390u">
            <link:definition>[822390u] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_146" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390v">
            <link:definition>[822390v] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_147" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390w">
            <link:definition>[822390w] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_148" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390x">
            <link:definition>[822390x] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_149" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390y">
            <link:definition>[822390y] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_150" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390z">
            <link:definition>[822390z] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_151" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390za">
            <link:definition>[822390za] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_152" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390zb">
            <link:definition>[822390zb] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_153" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390zc">
            <link:definition>[822390zc] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_154" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390zd">
            <link:definition>[822390zd] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_155" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390ze">
            <link:definition>[822390ze] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_156" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390zf">
            <link:definition>[822390zf] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_157" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390zg">
            <link:definition>[822390zg] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_158" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390zh">
            <link:definition>[822390zh] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_159" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390zi">
            <link:definition>[822390zi] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_160" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_7_role-822390zj">
            <link:definition>[822390zj] Notes - Financial instruments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_161" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_8_role-871100a">
            <link:definition>[871100a] Notes - Operating segments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_162" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_8_role-871100b">
            <link:definition>[871100b] Notes - Operating segments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_163" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_8_role-871100c">
            <link:definition>[871100c] Notes - Operating segments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_164" roleURI="https://www.a2a.eu/xbrl/role/all/ifrs_8_role-871100d">
            <link:definition>[871100d] Notes - Operating segments</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_165" roleURI="https://www.a2a.eu/xbrl/role/all/sic_29_role-832900">
            <link:definition>[832900] Notes - Service concession arrangements</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_166" roleURI="https://www.a2a.eu/xbrl/role/all/esef_role-000000">
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_167" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-110000">
            <link:definition>[110000] General information about financial statements</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_168" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-210000">
            <link:definition>[210000] Statement of financial position, current/non-current</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_169" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-220000">
            <link:definition>[220000] Statement of financial position, order of liquidity</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
        </link:roleType>
        <link:roleType id="id_170" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-410000">
            <link:definition>[410000] Statement of comprehensive income, OCI components presented net of tax</link:definition>
            <link:usedOn>link:definitionLink</link:usedOn>
            <link:usedOn>link:presentationLink</link:usedOn>
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            <link:definition>[420000] Statement of comprehensive income, OCI components presented before tax</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:usedOn>link:presentationLink</link:usedOn>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_177" roleURI="https://www.a2a.eu/xbrl/role/all/ias_1_role-880000">
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_182" roleURI="https://www.a2a.eu/xbrl/role/all/ias_26_role-710000">
            <link:definition>[710000] Statement of changes in net assets available for benefits</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_184" roleURI="https://www.a2a.eu/xbrl/role/all/ias_34_role-813000">
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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        <link:roleType id="id_188" roleURI="https://www.a2a.eu/xbrl/role/all/ias_7_role-520000">
            <link:definition>[520000] Statement of cash flows, indirect method</link:definition>
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            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:definition>[800300] Statement of cash flows, additional disclosures</link:definition>
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            <link:usedOn>link:presentationLink</link:usedOn>
            <link:usedOn>link:calculationLink</link:usedOn>
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            <link:definition>All Dimensions [table]</link:definition>
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</xsd:schema>
