/ Dictionary / Index T trithing: Meaning and Definition of Find definitions for: tri•thing Pronunciation: (trī'ing), [key] — n. riding. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tritheism triticale Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language