From Longman Dictionary of Contemporary Englishdeaf muteˌdeaf ˈmute noun [countable] HEAR#SPEAK1# old-fashioned, not polite someone who is unable to hear or speak
Examples from the Corpus
deaf mute• Using the pen he had bought from the deaf mute, he set about his task with diligence.• The deaf mute nodded once very briefly and then moved on, leaving Quinn with the pen in his hand.• The deaf mute said the company would never discriminate against a disabled employee. 