Adjective dumb has 4 senses
- dense, dim, dull, dumb, obtuse, slow - slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"
Antonym: smart (indirect, via stupid)
- speechless, dumb - unable to speak temporarily; "struck dumb"; "speechless with shock"
Antonym: articulate (indirect, via inarticulate)
- dumb - lacking the power of human speech; "dumb animals"
Antonym: articulate (indirect, via inarticulate)
- dumb, mute, silent - unable to speak because of hereditary deafness
Antonym: articulate (indirect, via inarticulate)
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