/ Dictionary / Index T ternary: Meaning and Definition of Find definitions for: ter•na•ry Pronunciation: (tûr'nu-rē), [key] — adj., n., pl. -ries. —adj. consisting of or involving three; threefold; triple. third in order or rank. based on the number three. consisting of three different elements or groups. (formerly) consisting of three atoms. having three variables. (of an alloy) having three principal constituents. —n. a group of three. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ternary (Thesaurus) terna ternary form Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language