1. devices that stop or prevent the movement or flow of something
Usage: technical; engineering
2. safety devices that protect electrical equipment from power surges
Usage: electrical engineering

Examples

• The flame arrestors prevented the fire from spreading through the pipeline.
• Lightning arrestors protect power lines from electrical surges during storms.
• The factory installed spark arrestors on all exhaust systems.
• Surge arrestors are essential components in electrical substations.
• The ship’s flame arrestors must be inspected regularly for safety.
• These arrestors will stop any backflow in the ventilation system.