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. noun
    without sharpness or clearness of edge or point
    “the dullness of the pencil made his writing illegible”
    synonyms: bluntness
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    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)
  2. noun
    the quality of lacking interestingness
    “the stories were of a dullness to bring a buffalo to its knees”
    synonyms: banality
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    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
  3. noun
    the quality of being slow to understand
    synonyms: obtuseness
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    types:
    oscitance, oscitancy
    drowsiness and dullness manifested by yawning
    type of:
    stupidity
    a poor ability to understand or to profit from experience
  4. noun
    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.”
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    type of:
    callosity, callousness, hardness, insensibility, unfeelingness
    the trait of being devoid of passion or feeling; hardheartedness
  5. noun
    a lack of visual brightness
    “the brightness of the orange sky was reflected in the dullness of the orange sea”
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    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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