blackout
US /ˈblæk.aʊt/
UK /ˈblæk.aʊt/

1.
a period when all lights go out in a building or area, either because of an electricity failure or because of an attack
:
•
The entire city experienced a sudden blackout last night.
•
During the war, cities often had to enforce a blackout to avoid enemy bombing.
2.
a temporary loss of consciousness
:
•
He experienced a sudden blackout after standing up too quickly.
•
The boxer suffered a brief blackout after a strong punch to the head.
3.
the suppression of news or information, especially by a government
:
•
The government imposed a media blackout on the protests.
•
There was a complete news blackout regarding the military operation.
1.
to impose a blackout on (an area or information)
:
•
The authorities decided to blackout the entire district for security reasons.
•
The network decided to blackout the controversial interview.