which

1. (interrogative) What, of those mentioned or implied.Examples: "Which song shall we play?"; "They couldn't decide which song to play."; "Which one is bigger?"interrogative

2. (relative, formal outside certain phrases) Designates the one(s) previously mentioned.Examples: "After glaring upon the smoking philosopher, who took his misfortunes with such positive nonchalance, he growled out an oath in German, which language is particularly adapted for growling in; then, raising his hand, he dealt him a blow on his pipe, which sent it, like a rocket, into the midst of the players."; "Whitaker’s blog post, housed on a website called Minutes Before Six, goes on to make references to Albert Camus’ 1947 classic, The Plague, dips into a Camus-inspired existential ramble and returns to an attempt to convey the detail of Prieto’s being essentially “noble,” which fact, he admits, will be lost in translation to anyone unfamiliar with death row units."; "All the phones come in plastic bodies that have been given a brushed-metal finish and carry 64-bit processors from Intel, which fact they proudly announce with an Intel Inside logo on the back."relative

1. (interrogative) What one or ones (of those mentioned or implied).Examples: "Which is which?"; "By now, you must surely know which is which."; "Which is bigger, the red one or the blue one?"interrogative

2. (not in common use) The/Any ones that; whichever.Examples: "Please take which you please."

3. (relative) In a non-restrictive relative clause, referring to something previously mentioned.Examples: "I dropped a saucepan, which knocked over the eggs, which went all over the kitchen floor."; "I found my camera, which I thought I'd lost, under the bed."; "I entered the room, at the far end of which was a small table."relative

4. (relative) In a non-restrictive relative clause, referring to something previously mentioned.Examples: "She had a young child, which cried incessantly."archaicrelative

5. (relative) In a non-restrictive relative clause, referring to something previously mentioned.Examples: "The front door was open, which concerned me."; "He had to leave, which was very difficult."; "She saved my life, for which I am eternally grateful."relative

6. (relative, sometimes proscribed, see usage notes) In a restrictive relative clause, referring to a noun previously mentioned.Examples: "This is the letter which I received."; "This is the letter in which he explains his decision."; "Forasmuch as many have taken in hand to set forth in order a declaration of those things which are most surely believed among us..."proscribedrelativesometimes