/ Dictionary / Index R root position: Meaning and Definition of Find definitions for: root' posi"tion Pronunciation: [key] — Music. Music. the position of a triad in which the root is in the bass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. root of unity root pressure Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language