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blackout

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blackout/ˈblækˌaʊt/noun
pluralblackouts
blackout
/ˈblækˌaʊt/
noun
pluralblackouts
Learner's definition of BLACKOUT  
[count]
: a period when lights are kept off or are hidden from view to guard against enemy airplane attack in a war
: a period when lights are off because of an electrical power failure
— compare brownout
: a sudden and temporary loss of consciousness, vision, or memory
: a situation in which some kinds of information are deliberately kept from the public
— see also black out at 3black
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