pronoun
- what one?: Which of these do you want? Which do you want?
- whichever; any one that: Choose which appeals to you.
- (used relatively in restrictive and nonrestrictive clauses to represent a specified antecedent): The book, which I read last night, was exciting. The socialism which Owen preached was unpalatable to many. The lawyer represented five families, of which the Costello family was the largest.
- (used relatively in restrictive clauses having that as the antecedent): Damaged goods constituted part of that which was sold at the auction.
- (used after a preposition to represent a specified antecedent): the horse on which I rode.
- (used relatively to represent a specified or implied antecedent) the one that; a particular one that: You may choose which you like.
- (used in parenthetic clauses) the thing or fact that: He hung around for hours and, which was worse, kept me from doing my work.
- Nonstandard. who or whom: a friend which helped me move; the lawyer which you hired.