black out

Short definition from Wiktionary

Verb

1. 1
   To censor or cover up by writing over with black ink.
2. 2
   To censor or cover up.
3. 3
   To lose consciousness; to suffer a blackout.
4. 4
   To cause (someone) to lose consciousness.
5. 5
   To obscure in darkness.
6. 6
   To be in a state of blackout, as a building, a city, a ship.

Noun

1. 1
   Alternative spelling of blackout.