Meaning & Definition
noun
A position of being popular or fashionable.
She always knows what is in.
preposition
Used to indicate inclusion within a space, place, or limits.
The cat is in the box.
Indicating a state or condition.
She is in a good mood today.
Indicating a period of time.
I will finish the project in two weeks.
Used to express a particular direction towards something.
He walked in the door.
adverb
Referring to a state of being at home.
Are you in?
Indicating a position within a place.
The dog is in.
Etymology
Old English 'innan', meaning 'inside, within'.
Common Phrases and Expressions
in a nutshell:
In summary or in brief.
in the zone:
In a state of concentration or focus.
in the dark:
Uninformed about something.
in good spirits:
In a happy or cheerful mood.
in the loop:
Informed about something.
Slang Meanings
Currently popular or trendy.
Those shoes are really in right now.
Current situation or state.
What's the deal? Are we in or out?