/ Dictionary / Index T tone-deaf: Meaning and Definition of Find definitions for: tone-deaf Pronunciation: (tōn'def"), [key] — adj. unable to distinguish differences in pitch in musical sounds when producing or hearing them. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tone-deaf (Thesaurus) tone control tone dialing Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language