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Definition of dull adjective from the Oxford Advanced American Dictionary

      

    dull

     adjective
    adjective
    NAmE//dʌl//
     
    (duller, dullest)
     
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    boring
  1. 1not interesting or exciting synonym dreary Life in a small town could be really dull. The countryside was flat, dull and uninteresting. The first half of the game was pretty dull. There's never a dull moment when John's around. Thesaurusboring
    • dull
    • tedious
    These words all describe a subject, activity, person, or place that is not interesting or exciting.
    • boring not interesting; making you feel tired and impatient:He's such a boring man! She found her job very boring.
    • dull not interesting or exciting:Life in a small town can be extremely dull.
    • tedious lasting or taking too long and not interesting, so that you feel bored and impatient:The journey soon became tedious.
    Patterns
    • to be boring/dull/tedious for somebody
    • boring/dull/tedious subjects/books
    • boring/dull/tedious jobs/work/games
    • a boring/dull place/man/woman/person
  2. light/colors
  3. 2not bright or shiny a dull gray color dull, lifeless hair Her eyes were dull.
  4. sounds
  5. 3not clear or loud The gates shut behind him with a dull thud.
  6. weather
  7. 4not bright, with a lot of clouds synonym overcast It was a dull, gray day.
  8. blades
  9. 5not sharp dull knives
  10. pain
  11. 6not very severe, but continuous a dull ache/pain
  12. person
  13. 7slow in understanding synonym stupid a dull student
  14. trade
  15. 8not busy; slow Don't sell in a dull market.
 
noun [uncountable] the dullness of modern architecture
NAmE//ˈdʌlli//
 
adverb “I suppose so,” she said dully. His leg ached dully.
Idioms
all work and no play (makes Jack a dull boy) (saying)
 
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it is not healthy to spend all your time working; you need to relax too
(as) dull as dishwater
 
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extremely boring I always found history as dull as dishwater.
See dull in the Oxford Advanced Learner's Dictionary