Definition of dumb verb from the Oxford Advanced American Dictionary

 

dumb

 verb
verb
NAmE//dʌm//
 
Verb Forms present simple I / you / we / they dumb
 
he / she / it dumbs
 
past simple dumbed
 
-ing form dumbing
 
 
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Phrasal Verbsdumb down
See the Oxford Advanced Learner's Dictionary entry: dumb