: material used to close open parts especially of a building for preventing the spread of fire
fire-stop transitive verb

Examples of fire-stop in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Properly flash chimneys with steel and fire-stop sealant and avoid spray foam. — Sean Krofssik, Hartford Courant, 4 Feb. 2026 Seal around electrical cables and vent pipes with a fire-stop sealant. — Sarah Moore, Freep.com, 12 Dec. 2025 The fire easily spread from the originating unit to the rest of the condos because there were no fire-stops in the attic, fire officials said. — Theresa Braine, New York Daily News, 25 Apr. 2024

Word History

First Known Use

1897, in the meaning defined above

Time Traveler
The first known use of fire-stop was in 1897

Browse Nearby Words

Cite this Entry

“Fire-stop.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fire-stop. Accessed 4 Oct. 2026.

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