adj. 1 wholly or partly without hearing (deaf in one ear). 2 (foll. by to) refusing to listen or comply. 3 insensitive to harmony, rhythm, etc. (tone-deaf). deaf-aid Brit. a hearing-aid. deaf-and-dumb alphabet (or language etc.) = sign language ° Sign language is preferred in official use. deaf as a post completely deaf. deaf mute a deaf and dumb person. fall on deaf ears be ignored. turn a deaf ear (usu. foll. by to) be unresponsive. deafly adv. deafness n.
[ OE deaf f. Gmc ]