fire·​brick | \ ˈfī(-ə)r-ˌbrik How to pronounce firebrick (audio) \

Definition of firebrick

: a refractory brick capable of sustaining high temperatures that is used especially for lining furnaces or fireplaces

Examples of firebrick in a Sentence

Recent Examples on the Web The other is lined with furnace cement, then covered with firebricks laid in place without mortar. Roy Berendsohn, Popular Mechanics, "How to Make a Forge and Start Hammering Metal," 2 Jan. 2020 Siemens built a new glass furnace with a small network of firebrick tubes. Jonathan Schifman, Popular Mechanics, "The Entire History of Steel," 9 July 2018 Its dense firebrick floor draws and holds the fire’s heat; the insulated crown stores heat overhead, balancing the thermal mass and radiating heat downward. Janet Fletcher, San Francisco Chronicle, "Why not wood-fire all your meals?," 17 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'firebrick.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of firebrick

1749, in the meaning defined above

Keep scrolling for more

Learn More about firebrick

Time Traveler for firebrick

Time Traveler

The first known use of firebrick was in 1749

See more words from the same year

Statistics for firebrick

Cite this Entry

“Firebrick.” Dictionary, Merriam-Webster, Accessed 24 Feb. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

More from Merriam-Webster on firebrick Encyclopedia article about firebrick

Comments on firebrick

What made you want to look up firebrick? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!