alter ego noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of alter ego noun from the Oxford Advanced American Dictionary

alter ego

noun

NAmE//ˌɔltər ˈiɡoʊ//

(pl. alter egos) (from Latin)

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.

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2a close friend who is very like yourself

See alter ego in the Oxford Advanced Learner's Dictionary

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