who's who

1 of 2

noun

variants often Who's Who
Synonyms of who's whonext
1
: a compilation of brief biographical sketches of prominent persons in a particular field
a who's who of sports figures
2
: the leaders of a group : elite
3
: a listing or grouping of notable persons or things

who's who

2 of 2

phrase

variant of who is who

: the identity of or the noteworthy facts about each of a number of persons

Examples of who's who in a Sentence

Recent Examples on the Web
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Noun
The reception was packed with a who's who and just as the doors opened, the crowd divided like the Red Sea. Arkansas Online, 15 Feb. 2026 However, that doesn't mean his compositions for Rob Marshall's epic 2005 film — starring a who's who of Asia's finest acting talent, including Zhang Ziyi, Michelle Yeoh, and Ken Watanabe — aren't worth seeking out. Alex Galbraith, Entertainment Weekly, 15 Feb. 2026 Also inside are soothing Centella Asiatica, which brings down inflammation, with a powerful blend of tranexamic acid, kojic acid, niacinamide, and azelaic acid (essentially a Who's Who of brightening ingredients). Deanna Pai, Allure, 29 Jan. 2026 Her client list reads like a who's who of A-listers, royals, and beauty insiders, all seeking skin that looks naturally radiant, not overly done. Pooja Shah, Forbes.com, 16 Jan. 2026 See All Example Sentences for who's who

Word History

First Known Use

Noun

1860, in the meaning defined at sense 1

Time Traveler
The first known use of who's who was in 1860

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Cite this Entry

“Who's who.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/who%27s%20who. Accessed 21 Feb. 2026.

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