come off

1.  Happen, occur, as in The trip came off on schedule. [Early 1800s]
2.  Acquit oneself, reach the end. This usage always includes a modifier, as in Whenever challenged he comes off badly, or This model is doomed to come off second-best. [Mid-1600s]
3.  Succeed, as in Our dinner party really came off. [Mid-1800s]
4.  See come off it.

Definition: transpire
Antonyms: not happen

The verb has 3 meanings:

Meaning #1: come to be detached
  Synonyms: detach, come away

Meaning #2: happen in a particular manner
  Synonyms: go off, go over

Meaning #3: break off; of a piece from a whole
  Synonyms: chip, chip off, break away, break off