a chamber in a furnace or boiler in which fuel is burned, the part of a steam engine where coal or other fuel is burned to produce heat and steam

firebox door, firebox grate, firebox liner

Formal and Informal Expressions of firebox

In different contexts, you can replace 'firebox' with suitable alternatives. In a more formal setting, 'combustion chamber' is apt. In informal speech or writing, 'furnace' is a commonplace synonym.

firebox: Explore its Definition & Usage

firebox Definition

1a chamber in a furnace or boiler in which fuel is burned
2the part of a steam engine where coal or other fuel is burned to produce heat and steam

Using firebox: Examples

Take a moment to familiarize yourself with how "firebox" can be used in various situations through the following examples!

Example
The firebox of the steam engine was filled with coal.
Example
The furnace's firebox was inspected for any damages.
Example
The boiler's firebox was cleaned before the winter season.

firebox Synonyms and Antonyms

Synonyms for firebox

furnace
boiler
combustion chamber

Phrases with firebox

firebox door
a door that provides access to the firebox for maintenance and cleaning
Example
The fireman opened the firebox door to add more coal to the furnace.
firebox grate
a metal grate that holds the fuel in place in the firebox
Example
The fireman adjusted the firebox grate to control the amount of air flowing into the furnace.
firebox liner
a refractory material that lines the walls of the firebox to protect it from high temperatures
Example
The firebox liner was replaced during the annual maintenance of the boiler.

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Summary: firebox in Brief

A 'firebox' [ˈfaɪərbɒks] is a chamber in a furnace or boiler where fuel is burned to produce heat and steam. It is an essential component of a steam engine, and its proper maintenance is crucial for efficient operation. The firebox has various parts, including the firebox door, firebox grate, and firebox liner, which are used for maintenance and cleaning.