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[fahyuh r-boks] /ˈfaɪərˌbɒks/
the box or chamber containing the fire of a steam boiler, furnace, etc.
the furnace of a locomotive, where coal, oil, or other fuel is burned to generate steam.
a box or panel with a device for notifying the fire station of an outbreak of fire.
Obsolete. a tinderbox.
Origin of firebox
1545-55; fire + box1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for firebox
  • The rusted steel firebox and back panel add an industrial-chic edge to the garden.
  • Also, raising the fuel has the effect of reducing the height of the firebox, the area of the fireplace where burning takes place.
  • Cut off the fire's air supply by closing any intake vents in the firebox.
  • Washout plugs shall be removed for access and visual inspection of the water side of the firebox sheets.
  • firebox-The cavity in the open face of the fireplace in which the fire is maintained.
  • There is a brick double arched firebox on the left elevation.
  • Be sure to specify the piece length you need, so you don't get wood too long to fit into your firebox.
  • The firebox door is left open through the first phase of the burn.
  • Two arched opening for the firebox are located opposite each other at the base.
  • Look for cracks at joints where the chimney connects to the firebox, at the roofline and in the attic.
British Dictionary definitions for firebox


the furnace chamber of a boiler in a steam locomotive
an obsolete word for tinderbox
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
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