fire door

noun

Definition of fire door

1 : the door or opening through which fuel is supplied to a furnace or stove
2 : a fire-resistive door specifically : an automatic door secured in the open position by a fusible link or thermostatically operated device designed to release the door under the influence of heat and permit its closing by gravity or by weights or other contrivances

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Cite this Entry

“Fire door.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fire%20door. Accessed 30 Sep. 2020.

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