• synonyms


[fahyuh r-boks]
  1. the box or chamber containing the fire of a steam boiler, furnace, etc.
  2. the furnace of a locomotive, where coal, oil, or other fuel is burned to generate steam.
  3. a box or panel with a device for notifying the fire station of an outbreak of fire.
  4. Obsolete. a tinderbox.
Show More

Origin of firebox

First recorded in 1545–55; fire + box1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for firebox

Historical Examples of firebox

  • The ends of the fuses were hidden by the tinder of the fuel in the firebox.

    Bloom of Cactus

    Robert Ames Bennet

  • No piece larger than a mans fist should be put in a firebox.

  • The straw burners are provided with a firebrick arch in the firebox.

  • He sped not only with the firebox open but with the forced draught.

  • The short legs of the pan rested on the red-hot coals in the firebox, while the cover was always within reach.

British Dictionary definitions for firebox


  1. the furnace chamber of a boiler in a steam locomotive
  2. an obsolete word for tinderbox
Show More
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012