n. a suspension of radio or tv broadcasting.n. any darkness resulting from the extinction of lights.n. the failure of electric power for a general region sufficient to extinguish all normal lighting.n. a momentary loss of consciousness.n. partial or total loss of memory.n. a period during which artificial lighting is forbidden, as in a city as a precaution against an air raid.n. the darkening of all stage lights, as at then end of a performance or between acts.n. suppression of information distribution.n. the prohibition of the broadcasting of a sports event, such as a boxing match or football game, sometimes confined to one particular area. It is usually done to encourage sales of tickets to the event.verb-intransitive. to experience a temporary loss of consciousness, memory, or vision.v. to cause to become black, such as a stage, a computer screen, or a city.v. to impose a blackout on (news or a sports event).v. to make (a written text) illegible by applying a black ink over it; to blot out.v. to suppress (a memory).