who's who

noun, often capitalized both Ws \ˌhüz-ˈhü\

Definition of who's who

  1. 1 :  a compilation of brief biographical sketches of prominent persons in a particular field <a who's who of sports figures>

  2. 2 :  the leaders of a group :  elite

  3. 3 :  a listing or grouping of notable persons or things


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