Dictonary and Thesaurus

Definition of Dull

(superl.) Slow of understanding; wanting readiness of apprehension; stupid; doltish; blockish.
(superl.) Slow in action; sluggish; unready; awkward.
(superl.) Insensible; unfeeling.
(superl.) Not keen in edge or point; lacking sharpness; blunt.
(superl.) 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.
(superl.) Heavy; gross; cloggy; insensible; spiritless; lifeless; inert.
(superl.) 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.
(v. t.) To deprive of sharpness of edge or point.
(v. t.) To make dull, stupid, or sluggish; to stupefy, as the senses, the feelings, the perceptions, and the like.
(v. t.) To render dim or obscure; to sully; to tarnish.
(v. t.) To deprive of liveliness or activity; to render heavy; to make inert; to depress; to weary; to sadden.
(v. i.) To become dull or stupid.