Dictionary.net

make numb or insensitive; "The shock numbed her senses"

(of color) very low in saturation; highly diluted; "dull greens and blues"

darkened with overcast; "a dark day"; "a dull sky"; "a gray rainy afternoon"; "gray clouds"; "the sky was leaden and thick"

not having a sharp edge or point; "the knife was too dull to be of any use"

not keenly felt; "a dull throbbing"; "dull pain"

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"

make less lively or vigorous; "Middle age dulled her appetite for travel"

become less interesting or attractive

become dull or lusterless in appearance; lose shine or brightness; "the varnished table top dulled with time"

make dull in appearance; "Age had dulled the surface"

make dull or blunt; "Too much cutting dulls the knife's edge"

blunted in responsiveness or sensibility; "a dull gaze"; "so exhausted she was dull to what went on about her"- Willa Cather

make numb or insensitive; "The shock numbed her senses"

deaden (a sound or noise), esp. by wrapping

(of color) very low in saturation; highly diluted; "dull greens and blues"

darkened with overcast; "a dark day"; "a dull sky"; "a gray rainy afternoon"; "gray clouds"; "the sky was leaden and thick"

not having a sharp edge or point; "the knife was too dull to be of any use"

not keenly felt; "a dull throbbing"; "dull pain"

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"

not clear and resonant; sounding as if striking with or against something relatively soft; "the dull thud"; "thudding bullets"; "thumping feet on the carpeted stairs"

make less lively or vigorous; "Middle age dulled her appetite for travel"

become less interesting or attractive

Slow of understanding; wanting readiness of apprehension; stupid; doltish; blockish.

Slow in action; sluggish; unready; awkward.

Insensible; unfeeling.

Not keen in edge or point; lacking sharpness; blunt.

Not bright or clear to the eye; wanting in liveliness of color or luster; not vivid; obscure; dim; as, a dull fire or lamp; a dull red or yellow; a dull mirror.

Heavy; gross; cloggy; insensible; spiritless; lifeless; inert.

Furnishing little delight, spirit, or variety; uninteresting; tedious; cheerless; gloomy; melancholy; depressing; as, a dull story or sermon; a dull occupation or period; hence, cloudy; overcast; as, a dull day.

To deprive of sharpness of edge or point.

To make dull, stupid, or sluggish; to stupefy, as the senses, the feelings, the perceptions, and the like.

To render dim or obscure; to sully; to tarnish.

To deprive of liveliness or activity; to render heavy; to make inert; to depress; to weary; to sadden.

Slow of understanding; wanting readiness of apprehension; stupid; doltish; blockish.

Slow in action; sluggish; unready; awkward.

Insensible; unfeeling.

Not keen in edge or point; lacking sharpness; blunt.

Not bright or clear to the eye; wanting in liveliness of color or luster; not vivid; obscure; dim; as, a dull fire or lamp; a dull red or yellow; a dull mirror.

Heavy; gross; cloggy; insensible; spiritless; lifeless; inert.

Furnishing little delight, spirit, or variety; uninteresting; tedious; cheerless; gloomy; melancholy; depressing; as, a dull story or sermon; a dull occupation or period; hence, cloudy; overcast; as, a dull day.

To deprive of sharpness of edge or point.

To make dull, stupid, or sluggish; to stupefy, as the senses, the feelings, the perceptions, and the like.

To render dim or obscure; to sully; to tarnish.

To deprive of liveliness or activity; to render heavy; to make inert; to depress; to weary; to sadden.

Slow of understanding or action; stupid; without sensibility; not bright or clear to the eye; blunt; not brisk or active; wearisome; cloudy.

To take away the sharpness of; make stupid or heavy; tarnish.

To become stupid; become dull or blunt; lose brightness.

Dully, dulness, dullness.

Not sharp or acute, in any sense; noting a surgical instrument, the action of the mind, pain, a sound, especially the percussion note, etc.

Slow of hearing, of learning, or of understanding: insensible: without life or spirit: slow of motion: drowsy: sleepy: sad: downcast: cheerless: not bright or clear: cloudy: dim, obscure: obtuse: blunt:- (comm.) little in demand.

DULLY.

DULLNESS or DULNESS.

To make dull: to make stupid: to blunt: to damp: to cloud.

To become dull.

DULLY.

Dulness.

To become dull.

Stupid; doltish; slow of hearing, seeing, understanding, or learning; without life or spirit; slow of motion; sleepy; drowsy; sad; depressing; dreary; insensible; cheerless; not clear; tarnished; not briskly burning; dim; obseure; blunt; obtuse; cloudy; being without wind.

To make dull or stupid; to blunt; to depress; to make insensible or slow to perceive; to make heavy or slow of motion; to sully; to tarnish or cloud.

Dulness.

Stupid; slow; spiritless; dim; blunt.

The primary idea is a stoppage of the faculties or powers proper to the subject; without spirit; not cheerful; stupid; slow of understanding; slow of hearing; slow to learn; not bright or clear; dim; obscure; blunt; cloudy.

To make dull; to stupefy; to blunt; to tarnish.

Not resonant on percussion.

Stupid, doltish, blockish, unapprehensive; blunt, obtuse; sad, melancholy; sluggish, heavy, slow of motion; not bright; drowsy, sleepy.