To move into (an object), such that one ends up inside it.
She got into the car.
To put on (an item of clothing).
I'm soaking wet. I need to get into some dry clothes.
To reach into (an object).
The small child got into everything.
To become involved or interested in (a discussion, issue, or activity).
He got into politics.
To enter (an unfavourable state).
How did we get into such a mess?
To cause to behave uncharacteristically; to possess.
I don't know what's gotten into that child.