/ Dictionary / Index V volume velocity: Meaning and Definition of Find definitions for: vol'ume veloc'ity Pronunciation: [key] — Physics. Physics. the movement caused by a sound wave of a unit volume of a sound-transmitting medium through a unit area per unit of time. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. volume unit voluminous Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language