Definition

A device or mechanism that stops the flow of something, such as water or electricity.

Example

The shutoff for the water supply is located in the basement.

Conversation

Did you see what happened with the water heater last night?

Yeah, I heard it just had a sudden shutoff and stopped working.

I hope it's not a big issue to fix.

I think it might just need a new shutoff valve or something.

Synonyms & Antonyms

Root Explanation

Shutoff → It is formed from "shut" (from Old English *scyttan*, meaning to close or block) and "off" (meaning away or not in operation). The word "shutoff" refers to the act of closing something to stop its operation or flow.

Memory Tip

Think of 'closing' something ('shut') to make it 'not in operation' ('off') — that's what a shutoff does.

Visually Confused Words