- whoW1S1 [hu:] pron[: Old English; Origin: hwa]1.) used to ask or talk about which person is involved, or what the name of a person is▪ Who locked the door?▪ Who do you work for?▪ Who's that guy with your wife?▪ They never found out who the murderer was.▪ She wondered who had sent the flowers.who to ask/contact/blame etc▪ He doesn't know who to vote for.who on earth/in the world etc(=used for emphasis when you are surprised, angry etc)▪ Who on earth would live in such a lonely place?▪ Who the hell are you?2.) used after a noun to show which person or which people you are talking about▪ Do you know the people who live over the road?▪ the woman who was driving▪ She was the one who did most of the talking.3.) used, after a ↑comma in writing, to add more information about a particular person or group of people that you have just mentioned▪ I discussed it with my brother, who is a lawyer.▪ Alison Jones and her husband David, who live in Hartlepool, are celebrating their golden wedding anniversary.4.) informal used to introduce a question that shows you think something is true of everyone or of no one▪ We have the occasional argument. Who doesn't? (=everyone does)▪ Who wants to come second? (=no one does)5.) who is sb to do sth?spoken used to say that someone does not have the right or the authority to say or do something▪ Who is she to order me around?6.) who's whoa) if you know who is who within a particular organization or group, you know what each person's name is and what job they do or what position they have▪ I'm just getting to know who's who in the department.b) a who's who of stha list of the important people within a particular organization or group - often used to emphasize that many important people are involved in something▪ The list of competitors reads like a who's who of international tennis players.
Dictionary of contemporary English. 2013.