inside or within something
I read about it in the paper.
surrounded by something
Leave the key in the lock.
entering something
She got in her car and drove off.
part of a whole
There are 31 days in May.
during a certain time
I'm getting forgetful in my old age.
after a certain time has passed
She learnt to drive in three weeks.
for a certain amount of time
It's the first letter I've had in ten days.
wearing something
She was all in black.
experiencing something
We went out in the rain.
using a certain language or material
Put it in writing.
in a certain state or condition
The house is in good repair.
participating in something
to act in a play
employed in a certain profession
He is in the army.
in a certain form or shape
Roll it up in a ball.
lacking in something
She was not lacking in courage.
while doing something
In attempting to save the child from drowning, she nearly lost her own life.
losing someone of a certain quality
We're losing a first-rate editor in Jen.
at a certain rate or amount
a tax rate of 22 pence in the pound
to or into the inside of something
She opened the door and went in.
inside something
We were locked in.
at home or present at a place
Nobody was in when we called.
at the arrival point
The bus is due in at six.
received or accepted
Applications must be in by April 30.
at or towards the land at high tide
Is the tide coming in or going out?
elected or chosen
Several new councillors got in at the last election.
batting in a game
the ball has landed inside the line
The ball landed in.
currently popular or fashionable
Exotic pets are the in thing right now.