laughterEnglishOxford American Thesauruslaughter noun 1 the sound of conversation and laughter: laughing, chuckling, chortling, guffawing, giggling, tittering, sniggering, howling, convulsions, fits; informal hysterics, hooting; rare cachinnation. 2 a source of laughter: amusement, entertainment, humor, mirth, merriment, gaiety, hilarity, glee, jollity, jocularity, fun, enjoyment, pleasure, delight, joy, festivity, light-heartedness, blitheness. ▷antonyms despair, gloom, misery.