Cite
 

Meaning of who's who

who's' who'

Pronunciation: [key]
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.