/ Dictionary / Index M major triad: Meaning and Definition of Find definitions for: ma'jor tri'ad Pronunciation: [key] a triad consisting in root position of a root tone with a major third and a perfect fifth above. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. major tranquilizer Majunga Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language