who's who

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who's who¹

  • /ˌhuːz ˈhuː/

Rhymes with -uː

Where it comes from

From Who's Who, the British publication of biographies for the upper class, first published in 1849.

noun who's whos · Who's Who

  1. capitalized, countable, sometimes A publication containing biographies of well-known or important people. Nearly every country has now a Who's Who, which gives a brief outline of the life and work of living men who have distinguished themselves in various ways.
  2. countable A list of notable, famous, or upper-class people. In the growing who's who of Negro educators, the name of Cleo W. Blackburn, 45, ranks high.
  3. uncountable Collectively, the elite class.
  4. countable A person appearing in a Who's Who publication. Sixty-one From Wisconsin Make Debut as Who's Whos [headline]:
  5. countable A celebrity or famous person, someone likely to be in such a publication.
  6. idiomatic, uncountable The identities of specific people, understood in terms of such distinguishing characteristics as their backgrounds, prominence, achievements, jobs, etc., as a basis for comparing them and especially as a basis for ranking them within a social group. Mrs. Falconer cannot well avoid asking you to some of her entertainments, and it will be pleasant to you to know who's who beforehand.

Who's Who²

noun

  1. alternative, uncountable Alternative form of who's who

Translations

Every language

noun publication containing biographies of well-known or important people

Русскийкто есть кто kto jestʹ kto

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MLA

"who's who." Wiktionary, via Micwyn, micwyn.com/word/who's%20who. Accessed 6 Nov. 2026.

APA

who's who. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/who's%20who

Chicago

"who's who." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/who's%20who.

BibTeX
@misc{who_s_who_2026,
  title = {who's who},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/who's%20who},
  urldate = {2026-11-06}
}