/ Dictionary / Index P passing modulation: Meaning and Definition of Find definitions for: pass'ing modula'tion Pronunciation: [key] — Music. Music. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. passing lane passing note Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language