risible

1 causing or intended to cause laughter a risible comment that made the whole class laugh Synonyms antic, chucklesome, comedic, comic, comical, droll, farcical, hilarious, humoristic, humorous, hysterical (also hysteric), killing, laughable, ludicrous, ridiculous, riotous, funny, screaming, sidesplitting, uproariousRelated Words amusing, diverting, entertaining; clownish, knockabout, slapstick, slapsticky, zany; facetious, flip, flippant, pert, smart, smart-aleck, smart-alecky, snickery; jocular, playful, waggish; campy, jokey (also joky); priceless, rich, whimsical, witty, wry; blithesome, gleeful, jocose, jocund, jolly, jovial, laughing, mad, merry, mirthfulNear Antonyms earnest, grave, no-nonsense, sedate, serious, severe, sober, sobersided, solemn, somber (or sombre), staid, unsmiling, weighty; affecting, moving, poignant, touching, tragic (also tragical); lachrymose, mournful, sad, sorrowful, tearful, woefulAntonyms humorless, lame, unamusing, uncomic, unfunny, unhumorous, unhysterical

2 so foolish or pointless as to be worthy of scornful laughter the idea that people are meant to have wings is risible Synonyms absurd, cockamamy (or cockamamie), comical, derisive, derisory, farcical, laughable, ludicrous, pathetic, preposterous, ridiculous, sillyRelated Words asinine, brainless, dumb, fatuous, foolish, half-baked, half-witted, harebrained, idiotic (also idiotical), imbecile (or imbecilic), inane, jerky, moronic, nonsensical, simpleminded, stupid, unwise, weak-minded, witless; balmy, cockeyed, crazy, cuckoo, daffy, daft, dotty, insane, kooky (also kookie), loony (also looney), lunatic, mad, nutty, screwball, senseless, wacky (also whacky); fantastic (also fantastical), far-fetched, inconceivable, incredible, unbelievable, unreal, unrealistic, unreasonable; illogical, irrationalNear Antonyms earnest, serious, solemn; believable, conceivable, credible, logical, rational, realistic, reasonable, sensible