- a device, consisting of wire netting or other material, used to stop or deflect sparks thrown from an open fireplace, a smokestack, or the like.
- Electricity. a device to reduce sparking at contacts where a circuit is opened and closed.
Origin of spark arrester
An Americanism dating back to 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A device designed to keep sparks from escaping, as at a chimney opening or where materials are being welded.
- A device used to control or curtail electric sparking at a point where a circuit is made or broken.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.