/ Dictionary / Index T trifid: Meaning and Definition of Find definitions for: tri•fid Pronunciation: (trī'fid), [key] — adj. cleft into three parts or lobes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: trifid (Thesaurus) trifecta trifid foot Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language