/ Dictionary / Index A air gun: Meaning and Definition of Find definitions for: air' gun" Pronunciation: [key] a gun operated by compressed air. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: airgun (Thesaurus) airglow air hammer Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language