kill switch noun 1verb 1forms 4 noun1 •A security measure used to switch off a device in an emergency.The company developed a ‘kill switch’ that would remotely encrypt its computers and devices if an office was raided by authorities. — 2022 verb1 •To switch off using a kill switch.Digitization supercharges financialization. It lets car-makers offer subprime auto-loans to desperate, poor people and then killswitch their cars if they miss a payment. — 2023 formskill switched · kill switching · kill switches · kill-switches