/ Dictionary / Index E excess sound pressure: Meaning and Definition of Find definitions for: ex'cess sound' pres"sure Pronunciation: [key] — Physics. Physics. See(def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. excess-profits tax exch. Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language