/ Dictionary / Index T triunitarian: Meaning and Definition of Find definitions for: tri•u•ni•tar•i•an Pronunciation: (trī-y"ni-târ'ē-un), [key] — n. Trinitarian. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triune triunity Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language