From Longman Dictionary of Contemporary EnglishRelated topics: Musictone-deafˌtone-ˈdeaf adjectiveAPMunable to hear the difference between different musicalnotesExamples from the Corpustone-deaf• Henry wasn't really very musical but Ivy Hooper was tone-deaf.• Years before, at Abbotsfield, Kate had told Peter that her father was tone-deaf.• Those damndirges are still running around my brain, like a tone-deafrat with a megaphone is trappedinside my head.