fire door

noun

1. a door through which a boiler or furnace is fired or through which the fire is inspected.
2. a fireproof or fire-resistant door in a building, intended to isolate an area from fire.

fire door

noun

1. a door made of noncombustible material, the purpose of which is to prevent a fire from spreading within a building
2. a similar door, leading to the outside of a building, that can be easily opened from inside; emergency exit

Word History and Origins

Origin of fire door¹

First recorded in 1830–40

Example Sentences

The fire-tube was wrought iron, the chimney stood up by the fire-door.

From Project Gutenberg

Always keep the fire door shut as much as possible, as cold air thus admitted will check the fire and ruin the boiler.

From Project Gutenberg

Once or twice will not do it; but continually leaving the fire door open will certainly work mischief in the end.

From Project Gutenberg

What is the result of opening the fire-door when the engine is working steam?

From Project Gutenberg

The chest is heated from the subjacent grate c, upon which the fuel is laid, through the fire-door d.

From Project Gutenberg