nouns
a suspension of radio or tv broadcasting
is a type of (narrower)
a time interval during which there is a temporary cessation of something
darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)
the failure of electric power for a general region
is a type of (narrower)
equipment failure resulting when the supply of power fails
"the ice storm caused a power outage"
a momentary loss of consciousness
is a type of (narrower)
a state lacking normal awareness of the self or environment
partial or total loss of memory
"he has a total blackout for events of the evening"