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Definition of dumb adjective from the Oxford Advanced Learner's Dictionary

dumb

adjective
 
/dʌm/
 
/dʌm/
(comparative dumber, superlative dumbest)
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  1. (especially North American English, informal) stupid
    • That was a pretty dumb thing to do.
    • If the police question you, act dumb (= pretend you do not know anything).
    • (offensive) In her early movies she played a dumb blonde.
    Extra Examples
    • I'm sure my question sounded really dumb.
    • The idea is unworkable and just plain dumb.
    • What are they talking about? It sounds dumb.
    • How could he be so dumb as to do that?
    • That's the dumbest idea I ever heard.
    • (offensive) She's going out with some dumb jock from her high school.
    Oxford Collocations Dictionaryverbs
    • be
    • feel
    • look
    adverb
    • extremely
    • fairly
    • very
    See full entry
  2. temporarily not speaking or refusing to speak
    • We were all struck dumb with amazement.
    • We sat there in dumb silence.
    • She stood in the doorway, dumb with rage.
    Oxford Collocations Dictionaryverbs
    • be
    • become
    • be struck
    preposition
    • with
    phrases
    • deaf and dumb
    See full entry
  3. (old-fashioned, offensive) unable to speak
    • She was born deaf and dumb.
    Dumb used in this meaning is old-fashioned and now considered offensive. You can use speech-impaired instead.
    Oxford Collocations Dictionaryverbs
    • be
    • become
    • be struck
    preposition
    • with
    phrases
    • deaf and dumb
    See full entry
  4. Word OriginOld English, of Germanic origin; related to Old Norse dumbr and Gothic dumbs ‘mute’, also to Dutch dom ‘stupid’ and German dumm ‘stupid’.
See dumb in the Oxford Advanced American Dictionary
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