/ Dictionary / Index T Trinity: Meaning and Definition of Find definitions for: Trin•i•ty Pronunciation: (trin'i-tē), [key] — pl. -ties Also calledthe union of three persons (Father, Son, and Holy Ghost) in one Godhead, or the threefold personality of the one Divine Being. a representation of this in art. See (l.c.) a group of three; triad. (l.c.) the state of being threefold or triple. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: trinity (Thesaurus) trinitrotoluene Trinity Sunday Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language