/ Dictionary / Index T trade language: Meaning and Definition of Find definitions for: trade' lan"guage Pronunciation: [key] a lingua franca, esp. one used primarily for trade and conducting business. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trade-in trade-last Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language