fire door

American  

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.

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fire door British  

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

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Etymology

Origin of fire door

First recorded in 1830–40

Example Sentences

Before fleeing the fire, Kovac loaded all his valuables into a room wrapped in concrete and equipped with a fire door capable of keeping out smoke and flames for three hours.

From Los Angeles Times • Aug. 10, 2025

Steph also noticed black dirt on the door handles and a full mop bucket being used to prop a fire door open.

From BBC • Jul. 29, 2024

Surveillance video captured Orlando entering the Capitol through a fire door on the west side of the building.

From Seattle Times • Nov. 29, 2023

The two-story property used to house Altype Fire Door, a fire door factory.

From New York Times • Apr. 14, 2020

Nobody's touched the fire door on his bus since that day.

From "Black Swan Green" by David Mitchell