/ Dictionary / Index S secondary seventh chord: Meaning and Definition of Find definitions for: sec'ondary sev'enth chord" Pronunciation: [key] — Music. Music. a chord formed by superposition of three thirds upon any degree of the scale except the dominant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. secondary school secondary sex characteristic Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language