- (v.t.) To deprive of sharpness of edge or point.
- (superl.) Slow of understanding; wanting readiness of apprehension; stupid; doltish; blockish.
- (v.i.) To become dull or stupid.
- (superl.) Slow in action; sluggish; unready; awkward.
- (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.
- (v.t.) To render dim or obscure; to sully; to tarnish.
- (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.
- (superl.) Insensible; unfeeling.
- (superl.) Heavy; gross; cloggy; insensible; spiritless; lifeless; inert.
- (v.t.) To deprive of liveliness or activity; to render heavy; to make inert; to depress; to weary; to sadden.
- (superl.) Not keen in edge or point; lacking sharpness; blunt.
- (v.t.) To make dull, stupid or sluggish; to stupefy, as the senses, the feelings, the perceptions, and the like.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). dull. Retrieved September 22, 2026, from http://smartdefine.org/dull/definitions/2000933 |
| Chicago | Webster's. 2011. "dull" http://smartdefine.org/dull/definitions/2000933 (accessed September 22, 2026). |
| Harvard | Webster's 2011, dull, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/dull/definitions/2000933>. |
| MLA | Webster's. "dull" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/dull/definitions/2000933> |