who's who

noun

often capitalized both Ws
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

Examples of who's who in a Sentence

Recent Examples on the Web
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The audience itself was a who's who of the business world, with former Starbucks CEO Howard Schultz spotted among the attendees. Christer Holloman, Forbes.com, 16 July 2025 Black Sabbath and Osbourne are the headliners on a day of music featuring a who's who in hard rock. Mike Snider, USA Today, 4 July 2025 Martin is palpably excited when discussing the album with Brown, alongside not just O'Brien but also a who's who of rock and roots music including Jackson Browne, Sierra Hull and Aoife O'Donovan. Marcus K. Dowling, The Tennessean, 2 July 2025 The guest list reads like a who's who of music, movies, and comedy: Jack Black, Benny Blanco, Ice Spice, Kel Mitchell, Victoria Monét, with more set to appear. Kilty Cleary, MSNBC Newsweek, 21 June 2025 See All Example Sentences for who's who

Word History

First Known Use

1917, in the meaning defined at sense 1

Time Traveler
The first known use of who's who was in 1917

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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 29 Jul. 2025.

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