1. a device that stops or prevents something from moving or operating
Usage: technical
2. a person who arrests someone
Usage: formal

Examples

• The flame arrestor prevented the fire from spreading through the pipeline.
• Lightning arrestors protect electrical equipment from power surges.
• The aircraft’s arrestor hook caught the cable on the carrier deck.
• A surge arrestor diverted the excess voltage safely to ground.
• The police officer served as the arrestor in the criminal case.
• Cable arrestors are essential safety devices in mining operations.