The Open Dictionary

kill switch

noun

UK/ˈkɪl ˌswɪtʃ/
US/ˈkɪl ˌswɪtʃ/

Definitions of kill switch noun

  1. Countable

    A switch designed for the rapid shutoff of power during an emergency situation.

    • The driver activated the vehicle's kill switch when faced with an emergency.

    • The application includes a kill switch to prevent damage in case of a malfunction.

    • For safety reasons, every machine in the factory is equipped with a kill switch.