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'dull' - used as an adjective
Synonyms for 'dull'
1. lacking in liveliness or animation
he was so dull at parties
a dull political campaign
a large dull impassive man
dull days with nothing to do
how dull and dreary the world is
fell back into one of her dull moods
2. emitting or reflecting very little light
a dull glow
dull silver badly in need of a polish
a dull sky
3. being or made softer or less loud or clear
the dull boom of distant breaking waves
4. so lacking in interest as to cause mental weariness
a dull play
his competent but dull performance
5. (of color) very low in saturation; highly diluted
dull greens and blues
6. not keenly felt
a dull throbbing
dull pain
7. slow to learn or understand; lacking intellectual acuity
although dull at classical learning, at mathematics he was uncommonly quick
8. (of business) not active or brisk
business is dull
9. not having a sharp edge or point
the knife was too dull to be of any use
10. blunted in responsiveness or sensibility
a dull gaze
so exhausted she was dull to what went on about her
11. not clear and resonant; sounding as if striking with or against something relatively soft
the dull thud
12. darkened with overcast
a dull sky

'dull' - used as a verb
13. make dull in appearance
Age had dulled the surface
14. become dull or lusterless in appearance; lose shine or brightness
the varnished table top dulled with time
15. deaden (a sound or noise), especially by wrapping
16. make numb or insensitive
17. make dull or blunt
Too much cutting dulls the knife's edge
18. become less interesting or attractive
19. make less lively or vigorous
Middle age dulled her appetite for travel

derived forms
1. Dull / Past
2. Dull / Third Person
3. Dull / Present Participle
4. Dull / Comparitive
5. Dull / Superlative
The following are synonyms for 'dull'. Click on any of them to get both Bibliodata's full list of common definitions and a further set of synonyms.
See also
  • lively
  • bright
  • sharp
  • sharpen
    Who Said that ?
    Death is a very dull, dreary affair, and my advice to you is to have nothing whatsoever to do with it. - Click here to find out.
    Fact of the day
    One of the most dangerous insect in the world is the common housefly. They carry and transmit more diseases than any other animal in the world.