Function: transitive verb
Date: 1890
1 a : to suppress by censorship < black out the news> b : BLOT OUT , ERASE < blacked out the event from his mind>
2 : to envelop in darkness < black out the stage>
3 : to make inoperative (as by a power failure)
4 : to impose a blackout on < blacked out the local game>
intransitive verb
1 : to become enveloped in darkness
2 : to undergo a temporary loss of vision, consciousness, or memory