/ Dictionary / Index F firebrat: Meaning and Definition of Find definitions for: fire•brat Pronunciation: (fīr'brat"), [key] — n. a bristletail, Thermobia domestica, that lives in areas around furnaces, boilers, steampipes, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: firebrat (Thesaurus) firebrand firebreak Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language