/ Dictionary / Index T TTS: Meaning and Definition of Find definitions for: TTS Pronunciation: [key] Teletypesetter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tts (Thesaurus) TTL meter TTY Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language