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temporary loss of vision and momentary unconsciousness due to diminished circulation to the brain and retina. Blackout refers specifically to a condition which sometimes occurs in aviators resulting from increased acceleration, which causes a decrease in blood supply to the brain cells. The term can also refer to other forms of temporary loss of consciousness and to fainting, as well as to temporary loss of memory and to certain forms of vertigo.
alcoholic blackout anterograde amnesia experienced by alcoholics during episodes of drinking, even when not fully intoxicated; it is indicative of early but still reversible brain damage.
An episode of forgetting all or part of what occurred during or following a period of alcohol intake.
See also: blackout