Definition of know who's who in US English:

know who's who

phrase

  • Be aware of the identity and status of each person.

    • ‘It benefits every investor to know who's who behind that set of magnificent oak doors, as each of the employees in a securities firm affects the real returns of one's investment portfolio.’
    • ‘This invaluable data base will be expanded and updated, helping us - and the media - know who's who in the corporate-scientific complex.’
    • ‘I loved my job and I was said to be very good at what I did, but I wasn't very good at that whole ‘knowing who's who in the corporate world’ thing.’
    • ‘The first thing we did when we got here was go around getting to know who's who before asking any questions.’
    • ‘Writing about the public consultation over plans for the introduction of non-medically qualified surgical care practitioners, Mr Phillips says it is important that patients know who's who.’
    • ‘Ensure that they know who's who and can identify company structure, individual roles and the existing communicative systems in use as soon as possible.’
    • ‘We're on a first-name basis with a lot of people and we know who's who in the community.’
    • ‘Certainly, a reader who knows who's who in this story will appreciate the humor and ingenuity considerably more.’
    • ‘Now I like to think I know who's who, but I have to admit to having to ask who our ‘basket case’ was this month.’