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Who's Who
1 dictionary results for: who's who
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
who's who
–noun
1.a reference work containing short biographical entries on the outstanding persons in a country, industry, profession, etc.: a who's who in automotive engineering.
2.the outstanding or influential persons in a community, industry, profession, or other group: The who's who of racing will be there.

[Origin: 1840–50]
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