Encyclopedia > Blackout

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The term "blackout" refers to a cessation of electromagnetic activity.
  • collectively minimizing external light (during war), especially upwards directed (or reflected) light, to "hide" from enemy aircraft (in the case of an occupied country: the enemy of the occupying force)
  • large-scale power failure
  • short dysfunctioning of the brain (loss of consciousness or not being able to think well)

See also communications blackout.

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