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Definition of megalomaniac noun from the Oxford Advanced Learner's Dictionary

megalomaniac

noun

/ˌmeɡələˈmeɪniæk/

/ˌmeɡələˈmeɪniæk/

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(disapproving or psychology) a person affected by or showing megalomania

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See megalomaniac in the Oxford Advanced American Dictionary

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megalomaniac adjective

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noun

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B2

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