/ Dictionary / Index T triform: Meaning and Definition of Find definitions for: tri•form Pronunciation: (trī'fôrm"), [key] — adj. formed of three parts; in three divisions. existing or appearing in three different forms. combining three different forms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triforium trifunctional Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language