/ Dictionary / Index T triangular trade: Meaning and Definition of Find definitions for: trian'gular trade' Pronunciation: [key] a pattern of colonial commerce in which slaves were bought on the African Gold Coast with New England rum and then traded in the West Indies for sugar or molasses, which was brought back to New England to be manufactured into rum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triangular matrix triangulate Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language