dull - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “dull”

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dull

adjective [-er/-est only]  us   /dʌl/

dull adjective [-er/-est only] (BORING)

not interesting or exciting; boring: Many of the courtroom events were dull and routine. The lecture was dry, dull, and full of statistics.

dull adjective [-er/-est only] (NOT BRIGHT)

not clear, bright, or shiny: The day started off dull and overcast with a threat of showers.

dull adjective [-er/-est only] (NOT SHARP)

(esp. of sound or pain) not sharp or clear: a dull knife I heard a dull thud from the kitchen. She felt a dull ache at the back of her head.

dull

verb [T]  us   /dʌl/
to make something less sharp or clear: Lack of sleep will dull your reflexes.
(Definition of dull from the Cambridge Academic Content Dictionary © Cambridge University Press)
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