Definition of which in English:

which

Line breaks: which
Pronunciation: /wɪtʃ
 
/

pronoun & determiner

Asking for information specifying one or more people or things from a definite set: [as pronoun]: which are the best varieties of grapes for long keeping? which of the suspects murdered him? [as determiner]: which way is the wind blowing?
More example sentences
  • What do you feel about this friend and which of his or her qualities do you see in yourself?

pronoun & determiner

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Used referring to something previously mentioned when introducing a clause giving further information: [as pronoun]: a conference in Vienna which ended on Friday [after preposition]: it was a crisis for which he was totally unprepared [as determiner, after preposition]: your claim ought to succeed, in which case the damages will be substantial
More example sentences
  • The game can also end if the stock runs out of cards, in which case the result is a draw.
  • So we do not need to step out of the house for days, which I am so looking forward to.
  • Cars go out in the first session in the order in which they finished the previous race.

Origin

Old English hwilc, from the Germanic bases of who and alike.

Usage

On the differences between which and that in relative clauses, see that (usage).

Phrases

which is which

Used to convey that it is difficult to distinguish between two or more people or things: there is no confusion as to which is which
More example sentences
  • And that can make it hard to distinguish which is which.
  • The writers suggest ways to distinguish which is which in any given congregation.
  • I can't recall offhand which is which (though you could figure it out.

Definition of which in:

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Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude