Definition of blackout noun from the Oxford Advanced Learner's Dictionary

     

    blackout

     noun
    noun
    BrE BrE//ˈblækaʊt//
     
    ; NAmE NAmE//ˈblækaʊt//
     
    The power industry, Conflict
     
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  1. 1a period when there is no light as a result of an electrical power failure See related entries: The power industry
  2. 2a situation when the government or the police will not allow any news or information on a particular subject to be given to the public The government imposed a news blackout during the crisis.
  3. 3[usually singular] a period of time during a war when all lights must be put out or covered at night, so that they cannot be seen by an enemy attacking by air It used to take hours to travel home in the blackout. See related entries: Conflict
  4. 4[usually plural] (British English) a covering for windows that stops light being seen from outside, or light from outside from coming into a room
  5. 5a temporary loss of consciousness, sight or memory She had a blackout and couldn't remember anything about the accident.
  6. Extra examples The government imposed a news blackout. The storm caused blackouts in many areas. They met during a blackout in the war.
See the Oxford Advanced American Dictionary entry: blackout