get into

1.  Become involved in, as in He got into trouble by stealing cars, or I don't want to get into the long history of this problem. [Early 1700s]
2.  Put on clothes, as in Wait till I get into my suit. [Late 1600s]
3.  Take possession of one, cause to act differently or inappropriately, as in You're leaving it to the animal shelter? What has got into you? or I don't know what gets into you children. [Late 1800s]
4.  See be into. Also see subsequent entries beginning with get into.

The verb has 5 meanings:

Meaning #1: get involved in or with
  Synonym: tangle with

Meaning #2: to come or go into
  Synonyms: enter, come in, get in, go into, go in, move into

Meaning #3: secure a place in a college, university, etc.
  Synonym: get in

Meaning #4: familiarize oneself thoroughly with

Meaning #5: put clothing on one's body
  Synonyms: wear, put on, don, assume