firestop
noun
firestop is a noun meaning “A fire block” (English Wiktionary, September 2026). It is spelled F-I-R-E-S-T-O-P, and it appears about once in every 85 million words in written English (wordfreq, 2021 data). The plural of firestop is firestops.
What does firestop mean?
noun
- 1
A fire block.
- 2
Any multi-component system designed to stop fire and smoke from migrating through openings around piping, wiring, ductwork, cable trays, bus ducts, etc., as well as through movement joints in walls and floors that are required to have a fire-resistance rating.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of firestop
- firestops plural
- fire stop
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is firestop?
Firestop appears about once in every 85 million words in written English, the 293,966th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does firestop come from?
From fire + stop.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).