/ Dictionary / Index A air cleaner: Meaning and Definition of Find definitions for: air' clean"er Pronunciation: [key] a filtering device for removing impurities from air: Many cars have air cleaners with replaceable filters. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. air chief marshal air coach Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language