Main Entry: black out

Function: verb

Date: 1890

transitive verb

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