1.Definition: a momentary loss of consciousness

Category: General

2.Definition: a suspension of radio or tv broadcasting

Category: General

3.Definition: darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)

Related Noun(s):brownout, dimout

Category: General

4.Definition: partial or total loss of memory

"He has a total blackout for events of the evening"

Related Noun(s):amnesia

Category: General

5.Definition: the failure of electric power for a general region

Category: General