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1. A device designed to keep sparks from escaping, as at a chimney opening.
2. A device used to control electric sparking at a point where a circuit is made or broken.
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|Noun||1.||spark arrester - electrical device to reduce sparking when electrical contacts are opened or closed|
electrical device - a device that produces or is powered by electricity
|2.||spark arrester - a wire net to stop sparks from an open fireplace or smokestack|