Main entry: pass out, black out, zonk out
Definition: lose consciousness due to a sudden trauma, for example
Main entry: black out
Definition: suppress by censorship as for political reasons
Usage: parts of the newspaper article were blacked out
Main entry: blacken out, black out
Definition: darken completely
Usage: The dining room blackened out
Main entry: black out
Definition: obliterate or extinguish
Usage: Some life-forms were obliterated by the radiation, others survived