who

Universal Words pronoun 1 used in questions to ask about the name, identity or function of one or more people: Who is that woman? * I wonder who that letter was from. * Who are you phoning? * Who's the money for? 2 used to show which person or people you mean: The people who called yesterday want to buy the house. * The people (who) we met in France have sent us a card. 3 used to give more information about sb: Mrs Smith, who has a lot of teaching experience at junior level, will be joining the school in September. * And then Mary, who we had been talking about earlier, walked in. compareWHOM IDIOMS who am I, who are you, etc. to do sth? used to ask what right or authority sb has to do sth: Who are you to tell me I can't park here? who's who people's names, jobs, status, etc: You'll soon find out who's who in the office.