blackout

/ˈblækaʊt/ noun [C]

Definition

UNCONSCIOUS › when someone suddenly becomes unconscious

NO INFORMATION › when information is kept from people: [usually singular] a media/news blackout

NO ELECTRICITY › a failure in the supply of electricity

NO LIGHTS › a period during a war when no lights must show at night

(Definition of blackout noun from the Cambridge Learner's Dictionary © Cambridge University Press)

to do something that spoils someone's plans

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