shutoff
nounUK /ˈʃʌtɒf/
US /ˈʃʌtɔf/
A shutoff is a switch or valve that stops something like water or power.
Turn the shutoff before you fix the leaky pipe.
OTHER MEANINGS
2. The act of stopping the flow or supply of something.
The storm caused a shutoff of electricity for hours.
3. A device that automatically stops a machine when something goes wrong.
The engine has a safety shutoff in case it gets too hot.
4. A period when a business or service is closed.
The water shutoff will last from noon to three.