dullness

When something is either muted and drab or incredibly boring, it has the quality of dullness. If you want to counteract your bedroom's dullness, why don't you paint the walls bright yellow with purple polka dots?

The dullness of late winter gradually ends when spring finally arrives with its bright colors and shining sunlight. The dullness of your most boring class will eventually come to an end as well, when the bell rings and it's time for lunch. Dullness describes a lack of vividness or excitement, and it can also be used for a lack of intelligence: "My dog is sweet, but her dullness makes it impossible to teach her any tricks."

Definitions of dullness
1

n without sharpness or clearness of edge or point

“the dullness of the pencil made his writing illegible”
Synonyms:
bluntness
Antonyms:
asperity, sharpness
harshness of manner
keenness, sharpness
thinness of edge or fineness of point
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Types:
obtuseness
the quality of lacking a sharp edge or point
Type of:
configuration, conformation, contour, form, shape
any spatial attributes (especially as defined by outline)

n the quality of lacking interestingness

“the stories were of a dullness to bring a buffalo to its knees”
Types:
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boringness, dreariness, insipidity, insipidness
extreme dullness; lacking spirit or interest
tediousness, tedium, tiresomeness
dullness owing to length or slowness
jejuneness, jejunity, tameness, vapidity, vapidness
the quality of being vapid and unsophisticated
drag
something tedious and boring
Type of:
uninterestingness
inability to capture or hold one's interest

n the quality of being slow to understand

Synonyms:
obtuseness
Types:
oscitance, oscitancy
drowsiness and dullness manifested by yawning
Type of:
stupidity
a poor ability to understand or to profit from experience

n lack of sensibility

“there was a dullness in his heart”
“without him the dullness of her life crept into her work no matter how she tried to compartmentalize it.”
Type of:
callosity, callousness, hardness, insensibility, unfeelingness
the trait of being devoid of passion or feeling; hardheartedness

n a lack of visual brightness

“the brightness of the orange sky was reflected in the dullness of the orange sea”
Antonyms:
brightness
the location of a visual perception along a continuum from black to white
Types:
dimness, subduedness
the property of lights or sounds that lack brilliance or are reduced in intensity
flatness, lusterlessness, lustrelessness, mat, matt, matte
the property of having little or no contrast; lacking highlights or gloss
Type of:
visual property
an attribute of vision

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