Who's is a contraction of "who is," as in "who's there? and "the friend who’s calling," or of "who has," as in "who's got the time?" and "the friend who’s helped before." Whose shows possession, as in "whose shoes are these?" or identifies or specifies someone or something, as in "the doctor whose name I forget" and "the book whose cover is torn."

who's uk / huːz / us / huːz / Add to word list short form of who has: Who's been chosen, do you know? short form of who is: Who's that talking to Jason?