Definition of Dull

Adjective: dull (duller,dullest) dÃºl

Lacking in liveliness or animation
"he was so dull at parties"; "a dull political campaign"; "a large dull impassive man"; "dull days with nothing to do"; "how dull and dreary the world is"; "fell back into one of her dull moods";
- hebetudinous
Emitting or reflecting very little light
"a dull glow"; "dull silver badly in need of a polish"; "a dull sky"
Being or made softer or less loud or clear
"the dull boom of distant breaking waves";
- muffled, muted, softened
So lacking in interest as to cause mental weariness
"a dull play"; "his competent but dull performance";
- boring, deadening, ho-hum, irksome, slow, tedious, tiresome, wearisome, deadly, unamusing, draggy, mind-numbing
(of colour) very low in saturation; highly diluted
"dull greens and blues"
Not keenly felt
"a dull throbbing"; "dull pain"
Taking more than usual time to learn or understand; lacking intellectual acuity
"although dull at classical learning, at mathematics he was uncommonly quick";
- dense, dim, dumb, obtuse, slow
(of business) not active or brisk
"business is dull";
- slow, sluggish
Not having a sharp edge or point
"the knife was too dull to be of any use"
Blunted in responsiveness or sensibility
"a dull gaze"; "so exhausted she was dull to what went on about her"
Not clear and resonant; sounding as if striking with or against something relatively soft
"the dull thud";
- thudding
Darkened with overcast
"a dull sky";
- leaden

Verb: dull dÃºl

Make dull in appearance
"Age had dulled the surface"
Become dull or lusterless in appearance; lose shine or brightness
"the varnished table top dulled with time"
Deaden (a sound or noise), especially by wrapping
- muffle, mute, damp, dampen, tone down
Make numb or insensitive
"The shock dulled her senses";
- numb, benumb, blunt
Make dull or blunt
"Too much cutting dulls the knife's edge";
- blunt
Become less interesting or attractive
- pall
Make less lively or vigorous
"Middle age dulled her appetite for travel"