get in

1.  Enter a place, as in We managed to get in just before the doors closed. [First half of 1500s]
2.  Arrive, as in We got in late last night. [Early 1600s]
3.  Be elected to office or become accepted, as in a club. For example, Marge asked the club if she could get in. The variant get into takes an object, as in Things changed after he got into office. [Late 1500s]
4.  Succeed in including, delivering, or finishing something, as in Can you get in that last paragraph? or I hope you'll get it in on time. Also see get in with.

Definition: infiltrate; find a way in
Antonyms: get out

The verb has 5 meanings:

Meaning #1: to come or go into
  Synonyms: enter, come in, get into, go into, go in, move into

Meaning #2: succeed in a big way; get to the top
  Synonyms: arrive, make it, go far

Meaning #3: to surrender someone or something to another
  Synonyms: hand over, turn in, deliver, render

Meaning #4: secure a place in a college, university, etc.
  Synonym: get into

Meaning #5: move into (a station) of trains
  Synonyms: pull in, move in, draw in