- a door made of noncombustible material, the purpose of which is to prevent a fire from spreading within a building
- a similar door, leading to the outside of a building, that can be easily opened from inside; emergency exit
WordReference Random House Unabridged Dictionary of American English © 2026
fire′ door′,
- Buildinga door through which a boiler or furnace is fired or through which the fire is inspected.
- Architecture, Buildinga fireproof or fire-resistant door in a building, intended to isolate an area from fire.
- 1830–40
Collins Concise English Dictionary © HarperCollins Publishers::
fire door n
'fire door' also found in these entries (note: many are not synonyms or translations):