/ Dictionary / Index H heat gun: Meaning and Definition of Find definitions for: heat' gun" Pronunciation: [key] a hand-held device that produces a flameless stream of extremely hot air, as for rapid drying or for softening paint for removal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heat exhaustion heath Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language