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

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

From Seattle Times • Nov. 29, 2023

Just make sure it isn't a fire door, as these can't function properly if they are propped open.

From BBC • Sep. 13, 2021

I opened a fire door, which locked closed behind me and I took in my surroundings.

From The Guardian • Feb. 14, 2019

I reached my hand out to open the fire door.

From "Shelter (Book One): A Mickey Bolitar Novel" by Harlan Coben