superl insensible; unfeeling.
2. dull ·vi to become dull or stupid.
3. dull ·vt to deprive of sharpness of edge or point.
4. dull ·superl slow in action; sluggish; unready; awkward.
5. dull ·superl not keen in edge or point; lacking sharpness; blunt.
6. dull ·superl heavy; gross; cloggy; insensible; spiritless; lifeless; inert.
7. dull ·superl slow of understanding; wanting readiness of apprehension; stupid; doltish; blockish.
8. dull ·vt to render dim or obscure; to sully; to tarnish.
9. dull ·vt to make dull, stupid, or sluggish; to stupefy, as the senses, the feelings, the perceptions, and the like.
10. dull ·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.
11. dull ·vt to deprive of liveliness or activity; to render heavy; to make inert; to depress; to weary; to sadden.
12. dull ·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.