ETYM Old Eng. def, deaf, deef, AS. deáf.
(Usually followed by 'to') Unwilling or refusing to pay heed; SYN. indifferent.
Lacking or deprive of the sense of hearing wholly or in part.

People who have severe hearing impairments.

A person with a severe auditory handicap.

British; hearing aid

Lacking the sense of hearing and the ability to speak; SYN. deaf-mute. deaf and dumb

Often offensive; a deaf person who cannot speak

Congenital deafness that results in inability to speak; SYN. deaf-muteness.

1. To be unbearably loud.
2. To make or render deaf; SYN. deaf.
3. To make soundproof.