dull

dull [adj1] unintelligent addled, backward, besotted, boring, brainless, daffy, daft, dense, dim, dim-witted, doltish, dumb, feeble-minded, half-baked, ignorant, imbecilic, indolent, insensate, low, moronic, not bright, numskulled, obtuse, scatterbrained, shallow, simple, simpleminded, slow, sluggish, stolid, stupid, tedious, thick, unintellectual, vacuous, wearisome, witless; concept 402 —Ant. intelligent, keen, sharp, smart, witty dull [adj2] insensitive accustomed, apathetic, blank, boring, callous, colorless, dead, depressed, empty, even, flat, heavy, impassible, inactive, indifferent, inert, insensible, jejune, languid, lifeless, listless, lumpy, monotonous, passionless, placid, prosaic, quiet, regular, routine, slack, slow, sluggish, spiritless, stagnant, still, stolid, torpid, unexciting, unresponsive, unsympathetic, usual, vacuous; concept 542 —Ant. lively, quick, sensitive, vivacious dull [adj3] boring, uninteresting abused, archaic, arid, big yawn*, blah, colorless, common, commonplace, dead, dismal, dreary, driveling, dry, familiar, flat, hackneyed, heavy, hoary, ho hum*, humdrum*, insipid, jejune, longwinded, monotonous, oft-repeated*, ordinary, out-of-date, plain, pointless, prolix, prosaic, prosy, repetitious, repetitive, routine, run-of-the-mill*, soporific, stale, stock, stupid, tame, tedious, tired, tiresome, trite, unimaginative, uninspiring, usual, usual thing, vapid, worn-out; concepts 529,530 —Ant. active, exciting, interesting, lively dull [adj4] not sharp blunt, blunted, edentate, edgeless, flat, not keen, obtuse, pointless, round, square, toothless, turned, unpointed, unsharpened; concept 486 —Ant. knifelike, pointed, serrated, sharp dull [adj5] uneventful accustomed, apathetic, blah, boring, dead, depressed, draggy*, even, falling off, flat, inactive, inert, languid, lifeless, listless, monotonous, placid, quiet, regular, routine, sitting tight*, slack, slothful, slow, sluggish, stagnant, still, stolid, tight, torpid, unexciting, unresponsive, usual, without incident, yawn; concept 548 —Ant. active, eventful, exciting, interesting, lively dull [adj6] drab, lackluster in effect on senses ashen, black, blind, cloudy, cold, colorless, dark, dead, dim, dingy, dismal, dun, dusky, faded, feeble, flat, grimy, hazy, indistinct, leaden, lifeless, low, matte, mousy, muddy, muffled, murky, muted, obscure, opaque, overcast, plain, shadowy, sober, soft, softened, somber, sooty, subdued, subfusc, toned-down, unlit; concepts 594,617 —Ant. bright, clear, light, luminous, lustrous