laughter

noun

1. the action or sound of laughing.
2. an inner quality, mood, disposition, etc., suggestive of laughter; mirthfulness: a man of laughter and goodwill.
3. an expression or appearance of merriment or amusement.
4. Archaic. an object of laughter; subject or matter for amusement.

noun

1. the action of or noise produced by laughing
2. the experience or manifestation of mirth, amusement, scorn, or joy

n.late 14c., from Old English hleahtor, from Proto-Germanic *hlahtraz (cf. Old Norse hlatr, Danish latter, Old High German lahtar, German Gelächter); see laugh (v.).