in
Pronunciation: /ɪn/
preposition
- 1expressing the situation of something that is or appears to be enclosed or surrounded by something else: I’m living in London dressed in their Sunday best she saw the bus in the rear-view mirror
- expressing motion with the result that something ends up within or surrounded by something else: don’t put coal in the bath he got in his car and drove off
- 2expressing a period of time during which an event happens or a situation remains the case: they met in 1885 at one o’clock in the morning I hadn’t seen him in years
- 3expressing the length of time before a future event is expected to happen: I’ll see you in fifteen minutes
- 4(often followed by a noun without a determiner) expressing a state or condition: to be in love I’ve got to put my affairs in order a woman in her thirties
- indicating the quality or aspect with respect to which a judgement is made: no discernible difference in quality
- 7indicating the language or medium used: say it in French put it in writing
- indicating the key in which a piece of music is written: Mozart’s Piano Concerto in E flat
adverb
adjective

Phrases
-
be in for
- have good reason to expect (something, typically something unpleasant): she’s in for a shock
- (be in for it) have good reason to expect trouble or retribution.
-
have (got) it in for
- see have.
-
in all
- see all.
-
in and out of
- being a frequent visitor to (a house) or frequent inmate of (an institution): they were in and out of each other’s houses all day he was in and out of jail for most of his twenties
-
in on
- privy to (a secret).
-
in so far as
- see far.
-
in that
- for the reason that: I was fortunate in that I had friends
-
in with
- informal on friendly terms with: the Krays were in with a couple of MPs
-
the ins and outs
- informal all the details.

Origin:
Old English in (preposition), inn, inne (adverb), of Germanic origin; related to Dutch and German in (preposition), German ein (adverb), from an Indo-European root shared by Latin in and Greek en