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. Thesaurusboringdull tediousThese 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. 7 slow in understanding synonym stupid a dull student
  14. trade
  15. 8 not busy; slow Don't sell in a dull market.
  16.  
    noun [uncountable] the dullness of modern architecture
  17. NAmE//ˈdʌlli//
     
    adverb “I suppose so,” she said dully. His leg ached dully.
  18. 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 the Oxford Advanced Learner's Dictionary entry: dull