American English

Definition of alter ego noun from the Oxford Advanced American Dictionary


    alter ego

    NAmE//ˌɔltər ˈiɡoʊ//
    (pl. alter egos) (from Latin)
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  1. 1a person whose personality is different from your own but who shows or acts as another side of your personality Superman's alter ego was Clark Kent.
  2. 2a close friend who is very like yourself
See the Oxford Advanced Learner's Dictionary entry: alter ego