/ Dictionary / Index F fog gun: Meaning and Definition of Find definitions for: fog' gun" Pronunciation: [key] a gun, fired at regular intervals, used as a warning signal in fog. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Foggia foggy Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language