/ Dictionary / Index Z zip gun: Meaning and Definition of Find definitions for: zip' gun" Pronunciation: [key] a homemade pistol, typically consisting of a metal tube taped to a wooden stock and firing a .22-caliber bullet. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zip fastener zip-in Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language