blackout
n//ˈblæk.aʊt//blackout, avsvimning, strömavbrott, mörkläggning
A temporary loss of consciousness.
A large-scale power failure, and resulting loss of electricity to consumers.
(historical) The mandatory blocking of all light emanating from buildings, as well as outdoor and street lighting as a measure against aerial bombing or naval attack, as imposed during, e.g., World War II.