What does "blackout" mean?

Vocabulary Word: blackout

1. Definition (n.) time during which one does not remember anything; time when the brain stops working properly

Examples I had a blackout last night after I hit my head. I can’t remember what happened for about 3 hours.

2. Definition (v.) lose consciousness

Examples I can’t remember what happened after the ball hit me in the head. I must have blacked out!

3. Definition (expr.) lose consciousness; when the electricity goes out

Examples Luckily we had some candles in the house when there was a blackout because of the storm.

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