who's who

play
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

First Known Use of who's who

1917


Learn More about who's who


Seen and Heard

What made you want to look up who's who? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!