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English definition of “black out something”

black out something

(NO LIGHT) phrasal verb with black verb
to have a failure in the supply of electricity, causing a loss of lights: The power failure blacked out all of northern Illinois. If you black out something, you prevent it from being seen: On my copy, they blacked all the names out so I couldn’t read them.
(Definition of black out something (NO LIGHT) from the Cambridge Academic Content Dictionary © Cambridge University Press)

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