which

Meaning of which in English

Interrogative adjective

1. being what one or ones out of these or those

Which book is yours? ー Which is your book?

2. and/but that[those]

I was there for an hour, during which time I saw nobody.

3. whichever; any … that

Take whichever seat you like.

Interrogative pronoun

1. what one or ones out of these or those, used to ask about a choice of things

Which is your book? ー Which book is yours?

Relative pronoun

1. ｟in restrictive use｠ used to introduce a clause that defines a word before it; that

This is the house which Washington lived in. ー This is the house in which Washington lived. ー This is the house where Washington lived.

2. ｟in non-restrictive use｠ and/but it[this, that]; a thing which

There is a big tree in the garden, which was planted by my grandpa.

3. the one that; any that; whichever

Choose which (of the books) you want.