who's who (English, noun)
expansion: who's who (countable and uncountable, plural who's whos)
Senses:
glosses: A publication containing biographies of well-known or important people.
tags: capitalized
countable
sometimes
glosses: A list of notable, famous, or upper-class people.
tags: countable
glosses: Collectively, the elite class.
tags: uncountable
glosses: A person appearing in a Who's Who publication.
tags: countable
glosses: A celebrity or famous person, someone likely to be in such a publication.
tags: countable
glosses: 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.
tags: idiomatic
uncountable
Forms:
form: who's whos
tags: plural
form: Who's Who
tags: alternative