1
: tedious, uninteresting
dull lectures
2
: lacking sharpness of edge or point
a dull knife
3
a
: not resonant or ringing
a dull booming sound
b
: lacking in force, intensity, or sharpness
a dull ache
4
: lacking brilliance or luster
a dull finish
5
: cloudy
dull weather
6
of a color
: low in saturation (see saturation sense 4a) and low in lightness
a dull green
7
: mentally slow : stupid
8
a
: slow in perception or sensibility : insensible
somewhat dull of hearing
dull to what went on about her—Willa Cather
b
: lacking zest (see zest sense 2) or vivacity : listless
a dull performance
9
: slow in action : sluggish
dull markets
dulled; dulling; dulls
: to make dull
dull a knife's edge
: to become dull
The blade dulled with use.
Cite this Entry
“Dull.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dull. Accessed 25 Mar. 2025.
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