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
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.
Synonyms
Examples of dull in a Sentence
Adjective
the dull roar of the crowd
the dull knife just bounced off the skin of the tomato without cutting it
Verb
Fog dulled the morning sunlight.
Special earplugs dulled the sound of the chain saw.
His hair dulled as he aged.
The dog's eyes dulled as he got sick.
She takes medicine to dull the pain.
Fear dulled his need for adventure.
The knife was dulled from use.
The blade should be replaced as soon as it dulls.
Recent Examples on the Web
Greg Autry, Forbes, 9 Dec. 2024
For her, the glory of the honeymoon had been in the planning, the dreaming, the building up in her mind; what a letdown to find that Paris was just a place, that some days were full of chill gray drizzle, that the dull, thick bodies of other tourists blocked her from full joy.
—Lauren Groff, The New Yorker, 8 Dec. 2024
Joseph Epstein, Newsweek, 10 Dec. 2024
Tequila and heroin can only dull the pain for so long before Lee’s desperate yearning for something more cuts through the haze and sends him back out into dingy bars and narrow alleys, prowling with a predatory lust for men.
—David Opie, IndieWire, 7 Dec. 2024
See all Example Sentences for dull 
Examples are automatically compiled from online sources to
show current usage.
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Adjective
While congressional hearings are often dull set pieces, this one offered a remarkably lively and informative discussion of the practicalities and opportunities facing America regarding space resources.
—Greg Autry, Forbes, 9 Dec. 2024
For her, the glory of the honeymoon had been in the planning, the dreaming, the building up in her mind; what a letdown to find that Paris was just a place, that some days were full of chill gray drizzle, that the dull, thick bodies of other tourists blocked her from full joy.
—Lauren Groff, The New Yorker, 8 Dec. 2024
Verb
The previous Traverse wasn't a sports car either, but the height and the width of the new SUV dull its road manners.
—Joseph Epstein, Newsweek, 10 Dec. 2024
Tequila and heroin can only dull the pain for so long before Lee’s desperate yearning for something more cuts through the haze and sends him back out into dingy bars and narrow alleys, prowling with a predatory lust for men.
—David Opie, IndieWire, 7 Dec. 2024
See all Example Sentences for dull
Dictionary Entries Near dull
Cite this Entry
“Dull.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dull. Accessed 21 Dec. 2024.
Copy CitationKids Definition
dull
1 of 2 adjective1
: mentally slow : stupid
2
: listless
3
: slow in action : sluggish
4
: lacking sharpness of edge or point
5
: lacking brilliance or luster
6
: not ringing, sharp, or intense
a dull roar
7
8
: tedious, uninteresting
a dull lecture
9
: slightly grayish
a dull blue
dull
2 of 2 verb
: to make or become dull
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