/ Dictionary / Index F fire hat: Meaning and Definition of Find definitions for: fire' hat" Pronunciation: [key] a helmet worn by a firefighter as a defense against falling materials from burning structures. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fireguard firehorse Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language