Word.ws English Dictionary

firestop

firestop noun: a fire block.

firestop: a fire block
Image: Achim Hering, CC BY 3.0, via Wikimedia Commons

Noun

firestop (plural firestops)

  1. A fire block.
    Synonyms:
    draft stop
  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.

Synonyms of firestop

Forms of firestop

pluralfirestops
alternative formfire stop

Origin of firestop

From fire + stop.

Questions about firestop

What does firestop mean?
Firestop means a fire block.
What part of speech is firestop?
Firestop is a noun.
What is the plural of firestop?
The plural of firestop is firestops.

Words near firestop in the dictionary

  1. firestink
  2. firestone
  3. Firestone layaway
  4. Firestone layaways
  5. firestones
  6. firestop
  7. firestopping
  8. firestops
  9. firestorm
  10. firestorms
  11. firestream

Source and license

Adapted from Wiktionary: firestop (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “firestop.” Word.ws, https://word.ws/firestop. Based on Wiktionary, CC BY-SA 4.0.