/ Dictionary / Index S sixth chord: Meaning and Definition of Find definitions for: sixth' chord" Pronunciation: [key] — Music. Music. an inversion of a triad in which the second note (next above the root) is in the bass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sixth Amendment sixth column Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language