Definition of who’s who noun from the Oxford Advanced Learner's Dictionary


who’s who

BrE BrE//ˌhuːz ˈhuː//
; NAmE NAmE//ˌhuːz ˈhuː//
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a list or book of facts about famous people The list of delegates attending read like a who's who of the business world. From the reference book Who’s Who, which gives information about many well-known people and what they have done.

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