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BLACKOUT

Definition:

[noun] a suspension of radio or tv broadcasting
[noun] darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)
Synonyms: brownout, dimout
[noun] the failure of electric power for a general region
[noun] a momentary loss of consciousness
[noun] partial or total loss of memory; "he has a total blackout for events of the evening"
Synonyms: amnesia, memory loss