STUPID

adj. 1 unintelligent, fatuous, obtuse, bovine, dull, dense, lumpish, doltish, simple, simple-minded, moronic, imbecilic, cretinous, Boeotian, subnormal, feeble-minded, weak-minded, stolid, dull-witted, dim, dim-witted, halfwitted, thick, thick-witted, thickheaded, slow-witted, witless, brainless, mindless, empty-headed, bird-brained, feather-brained, feather-headed, rattle-brained, rattle-headed, ox-like, boneheaded, addle-pated, addle-headed, addled, Chiefly Brit imbecile, Chiefly US dumb, jerky, thimble-witted, Colloq dopey, Brit dozy He seemed really stupid in comparison with his precocious younger sister 2 foolish, silly, frivolous, asinine, hare-brained, crazy, insane, mad, crack-brained, scatterbrained, absurd, inane, idiotic, ridiculous, risible, laughable, ludicrous, nonsensical, senseless, bootless, irresponsible, irrational, ill-advised, foolhardy, half-baked, Colloq cuckoo, cock-eyed, damn-fool, Chiefly Brit daft, barmy or balmy, US cockamamie or cockamamy He came up with one stupid plan after another 3 insipid, dull, tedious, boring, tiresome, humdrum, prosaic, monotonous, unimaginative, uninspired, uninteresting, vapid, vacuous, Colloq ho-hum Most sitcoms feature stupid characters doing stupid things