blackout

noun
UK /ˈblækaʊt/
US /ˈblækaʊt/

A blackout is when the lights suddenly go out because there is no power.

The storm caused a blackout, so we used candles to see.


OTHER MEANINGS

2. A short time when someone faints or cannot remember what happened.

He had a blackout after standing up too fast.

3. When news or information is hidden from people on purpose.

The government ordered a news blackout during the event.

4. When a place makes all its windows dark so no light can be seen.

The city had a blackout to stay safe at night.