a door through which a boiler or furnace is fired or through which the fire is inspected.
a fireproof or fire-resistant door in a building, intended to isolate an area from fire.
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How to use fire door in a sentence
The fire-tube was wrought iron, the chimney stood up by the fire-door.Life of Richard Trevithick, Volume II (of 2) | Francis Trevithick
Always keep the fire door shut as much as possible, as cold air thus admitted will check the fire and ruin the boiler.Farm Engines and How to Run Them | James H. Stephenson
Once or twice will not do it; but continually leaving the fire door open will certainly work mischief in the end.Farm Engines and How to Run Them | James H. Stephenson
What is the result of opening the fire-door when the engine is working steam?The Traveling Engineers' Association | Anonymous
The chest is heated from the subjacent grate c, upon which the fuel is laid, through the fire-door d.A Dictionary of Arts, Manufactures and Mines | Andrew Ure
British Dictionary definitions for fire door
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012