jocosity

A jocose act or saying; jocoseness. Sir T. Browne.

noun

1. A state of joyful exuberance: blitheness, blithesomeness, gaiety, glee, gleefulness, hilarity, jocoseness, jocularity, jocundity, jolliness, jollity, joviality, lightheartedness, merriment, merriness, mirth, mirthfulness. See laughter.
2. The quality of being laughable or comical: comedy, comicality, comicalness, drollery, drollness, farcicality, funniness, humor, humorousness, jocoseness, jocularity, ludicrousness, ridiculousness, wit, wittiness, zaniness. See laughter.

The noun has 2 meanings:

Meaning #1: fun characterized by humor
  Synonym: jocularity

Meaning #2: the trait of merry joking
  Synonyms: jocoseness, merriness, humorousness