/ Dictionary / Index S sound pressure: Meaning and Definition of Find definitions for: sound' pres"sure Pronunciation: [key] — Physics. Physics. Also calledthe difference between the pressure at a point in a medium through which a sound wave is passing and the static pressure of the medium at that point. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sound motion picture soundproof Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language