Definition of: laughter

(laf′tər, läf′-) noun
1. The sound or action of laughing.
2. Any exclamation or expression indicating merriment or derision. ♦ Collateral adjective; risible. [OE hleahtor <root of hlœhhan laugh] Synonyms: cachinnation, fun, giggling, glee, hilarity, jollity, merriment, mirth, rejoicing, snickering, tittering. Antonyms: distress, frowning, gloom, glowering, groaning, lowering, mourning, sadness, sorrow, tears, wailing, weeping.