/ Dictionary / Index T trident: Meaning and Definition of Find definitions for: tri•dent Pronunciation: (trīd'nt), [key] — n. a three-pronged instrument or weapon. a three-pronged spear used by a retiarius in gladiatorial combats. the three-pronged spear forming a characteristic attribute of the sea god Poseidon, or Neptune. a fish spear having three prongs. (cap.) a 34-ft (10-m) submarine-launched U.S. ballistic missile with eight to ten warheads and a range of 6500 mi. (10,459 km). —adj. having three prongs or tines. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: trident (Thesaurus) tridarn cupboard tridentate Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language