firebox

noun

fire·​box ˈfī(-ə)r-ˌbäks How to pronounce firebox (audio)
1
: a chamber (as of a furnace or steam boiler) that contains a fire
2
: a box containing an apparatus for transmitting an alarm to a fire station

Examples of firebox in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
There’s a door on the top of the hopper for adding charcoal, and a firebox door down below. — PC Magazine, 1 July 2025 To the left of the TV sat an enormous fireplace with a firebox bricked up. — Literary Hub, 19 Mar. 2026 The oily, tar-like creosote inside your firebox can be dissolved with an alkaline cleaner. — Brandee Gruener, Southern Living, 5 Oct. 2025 Large tiles Embrace the square firebox shape by outlining the fireplace with large 12-by-12-inch tiles for a geometric take. — Yelena Moroz Alpert, Architectural Digest, 20 Nov. 2024 See All Example Sentences for firebox

Word History

First Known Use

1735, in the meaning defined at sense 1

Time Traveler
The first known use of firebox was in 1735

Rhymes for firebox

See All Rhymes for firebox

Browse Nearby Words

firebote
firebox
firebrand
See all Nearby Words

Cite this Entry

“Firebox.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/firebox. Accessed 7 Jul. 2026.

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Kids Definition

firebox

noun
fire·​box -ˌbäks How to pronounce firebox (audio)
1
: a chamber (as of a furnace) that contains a fire
2
: a box containing a fire alarm
Last Updated: - Updated example sentences
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