|part of speech:
||(informal) not smart; stupid.
It was a dumb idea to cut your own hair.Her brother says she's dumb, but I think she's smart.
- clever, intelligent, smart
- similar words:
- dull, silly, simple, slow, thick
||not able to speak.
She has been deaf and dumb since childhood.
||dumbly (adv.), dumbness (n.)