auto-shutoff device
nounUK /ˌɔːtəʊ ˈʃʌtɒf dɪˌvaɪs/
US /ˌɔːtoʊ ˈʃʌtɔf dɪˌvaɪs/
A machine that turns itself off when it is done or when something is wrong.
The kettle has an auto-shutoff device so it stops boiling when the water is ready.
RELATED WORDS
OTHER MEANINGS
2. A feature in a car that stops the engine by itself to save fuel.
The car's auto-shutoff device turns the engine off at red lights.
3. A safety part in a heater that cuts the power if it gets too hot.
The space heater's auto-shutoff device clicked on when it tipped over.
4. A setting on a phone or computer that turns the screen off after a while.
I set the auto-shutoff device on my tablet to save battery.