/ Dictionary / Index U upper partial tone: Meaning and Definition of Find definitions for: up'per par'tial tone" Pronunciation: [key] — Music. Music. overtone (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Upper Paleolithic Upper Peninsula Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language