Nouns

(n)blackouta suspension of radio or tv broadcasting
(n)blackout, brownout, dimoutdarkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)
(n)blackoutthe failure of electric power for a general region
(n)blackouta momentary loss of consciousness
(n)amnesia, memory loss, blackoutpartial or total loss of memory“he has a total blackout for events of the evening”