/ Dictionary / Index J just intonation: Meaning and Definition of Find definitions for: just' intona'tion Pronunciation: [key] — Music. Music. a system of tuning based on the pure perfect fifth and major third. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Justin Martyr Justitia Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language