temporarily unable or unwilling to speak

she stood dumb while he poured out a stream of abuse

(of a person) unable to communicate through speech on account of a congenital or pathological condition

he was born deaf, dumb, and blind

lacking intelligence; stupid

a dumb question

people are dumb enough to believe it

(of a computer terminal) able only to transmit data to or receive data from a computer; having no independent processing capability

make dumb or unheard; silence

a splendour that dazed the mind and dumbed the tongue