Shutoff (noun)

An action of shutting off something, such as a valve or switch, that stops the flow or supply of something, such as water or electricity.

Origin:

From shut + off.

Examples:

1. The water shutoff was located in the basement.
2. The gas shutoff was located outside.
3. The shutoff valve was used to control the flow of water.
4. The shutoff switch was used to turn off the power.
5. The shutoff was used to stop the flow of gas in case of emergency.