/ Dictionary / Index N noise pollution: Meaning and Definition of Find definitions for: noise' pollu"tion Pronunciation: [key] unwanted or harmful noise, as from automobiles, airplanes, or industrial workplaces. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. noisemaker noiseproof Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language