/ Dictionary / Index H harpoon gun: Meaning and Definition of Find definitions for: harpoon' gun" Pronunciation: [key] a small cannon for shooting harpoons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. harpoon harp seal Related Content Daily Word Quiz: menagerie Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language