adjective
1.
Synonyms: simple 3, asinine, brainless, fatuous, senseless, silly, unwitty, weak-headed, weak-minded, witless
Related Word: idiotic, imbecilic, moronic; daft, feebleminded, half-witted; *half-assed, half-cocked; irrational
Contrasted words: bright, clever, intelligent, quick-witted
Antonyms: smart
2.
felt to be ridiculous because not exhibiting good or conventional sense
a foolish investment
Synonyms: absurd, ||balmy, cockamamie, crazy, daffy, ||dilly, ||dippy, donkeyish, dotty, fantastic, harebrained, idleheaded, insane, kooky, loony, loopy, lunatic, mad, nutty, ||potty, preposterous, sappy, silly, tomfool, unearthly, wacky, zany
Related Word: laughable, ludicrous, ridiculous; half-baked, headless, jerky, nonsensical; offbeat, unacceptable, unconventional, unorthodox
Contrasted words: judicious, sage, sapient; discreet, foresighted, prudent; canny, shrewd, slick
Antonyms: sensible; wise