Not having a sharp edge or point; blunt: a dull knife.
Not intensely or keenly felt: a dull ache.
Arousing no interest or curiosity; boring: a dull play.
Not bright or vivid. Used of a color: a dull brown.
Cloudy or overcast: a dull sky.
Not clear or resonant: a dull thud.
tr. & intr.v.
dulled, dull·ing, dulls To make or become dull.
[Middle English dul; akin to Old English dol.] dull'ish adj., dull'ness, dul'ness n., dul'ly adv.
Synonyms: These adjectives mean lacking in liveliness, charm, or surprise: a dull, uninteresting performance; a colorless and unimaginative person; a drab and boring job; a humdrum conversation; a lackluster life; a pedestrian movie plot; a stodgy dinner party; an uninspired lecture.