/ Dictionary / Index F firebrick: Meaning and Definition of Find definitions for: fire•brick Pronunciation: (fīr'brik"), [key] — n. a brick made of fire clay. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: firebrick (Thesaurus) firebreak fire brigade Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language