dumb Meaning in the Cambridge English Dictionary
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Meaning of “dumb” in the English Dictionary

"dumb" in British English

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dumbadjective

uk   us   /dʌm/

dumb adjective (SILENT)

C1 permanently or ​temporarilyunable to ​speak: He's been ​deaf and dumb since ​birth. She was struck dumb by what she had ​seen.

dumb adjective (STUPID)

B2 mainly US informal stupid : Are they ​brave or just dumb? What a dumb ​idea!
dumbness
noun [U] uk   us   /ˈdʌm.nəs/
(Definition of dumb from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"dumb" in American English

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dumbadjective

 us   /dʌm/

dumb adjective (STUPID)

[-er/-est only] infml stupid: Don’t say anything – just ​act/​play dumb (= ​pretend to be ​stupid or not to ​know something).

dumb adjective (SILENT)

(Definition of dumb from the Cambridge Academic Content Dictionary © Cambridge University Press)
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