adj. 1 stupid, slow-witted, dense, stolid, bovine, cloddish, clod-like, backward, obtuse, doltish, crass, dumb, Colloq thick, dim, dim-witted, Brit dim as a Toc H lamp He might be a dull student but he's a brilliant artist 2 insensitive, numb, insensible, imperceptive or impercipient, unresponsive, indifferent, unfeeling, unsympathetic, callous, hardened, hard, inured, obtundent He knew that he could expect only a dull response to his pleading 3 lifeless, indifferent, unresponsive, sluggish, slow, listless, inactive, torpid The market for luxury cars is a little dull now 4 boring, tiresome, tedious, monotonous, uninspired, uninspiring, unoriginal, uninteresting, humdrum All work and no play make Jack a dull boy 5 dismal, dreary, depressing, sombre, grey, dark, murky, gloomy, cloudy, clouded, overcast, sunless If the day is dull, the photographs will show it 6 blunted, blunt; obtuse I nicked myself with that dull razor 7 hazy, blurry, opaque, drab Rub the dull film off that silver goblet 8 muffled, numbing, deadened, muted, indistinct I've had a dull pain in my arm all day
v. 9 allay, assuage, relieve, mitigate, lessen, reduce Weeping dulls the inner pain 10 dim, tarnish, obscure, bedim, blur, cloud, becloud A mist dulled the rich colours of the glen 11 stupefy, narcotize, numb, benumb, desensitize, deaden, blunt, obtund His war experiences had dulled his feelings towards others