FluentPlex

dull

/dʌl/ adjective B1
  1. Lacking the ability to cut easily; not sharp. · All these knives are dull.
  2. Boring; not exciting or interesting. · He sat through the dull lecture and barely stayed awake.
  3. Not shiny; having a matte finish or no particular luster or brightness. · Choose a dull finish to hide fingerprints.· a dull fire or lamp; a dull red or yellow; a dull mirror
  4. Not bright or intelligent; stupid; having slow understanding.
  5. Sluggish, listless.
  6. Bored, depressed, down. · I felt dull all day.
  7. Cloudy, overcast. · It's a dull day.
  8. Insensible; unfeeling.

Comparative duller · Superlative dullest

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From the library

And there’s one thing certain, no house will ever be dull that she’s in.”
Anne of Green Gables, p. 104 · C1
As I looked at the deep-set windows and the long sweep of the dull-coloured, water-lapped front, I felt that no more fitting scene could be set for such a tragedy.
The Valley of Fear, p. 39 · C1
Once the house had been painted, but the sun blistered the paint and the rains washed it away, and now the house was as dull and gray as everything else.
The Wonderful Wizard of Oz, p. 1 · B2
“And once again, if the thought of leaving a bicycle concealed outside had occurred to you, would it really have seemed worth doing when the dullest detective would naturally say this is an obvious blind, as the bicycle is the first thing which the fugitive needed in order to make his escape.”
The Valley of Fear, p. 71 · C1

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.