a person whose personality is different from your own but who shows or acts as another side of your personality
Example:
- Superman's alter ego was Clark Kent.
a close friend who is very like yourself
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/ˌɔːltər ˈiːɡəʊ//ˌɔːltər ˈiːɡəʊ/Word Originmid 16th cent.: Latin, ‘other self’.
a person whose personality is different from your own but who shows or acts as another side of your personality
a close friend who is very like yourself