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.
