1.
If you black out , you lose consciousness for a short time.
Samadov said that he felt so ill that he blacked out.
= pass out
PHRASAL VERB : V P
2.
If a place is blacked out , it is in darkness, usually because it has no electricity supply.
Large parts of the capital were blacked out after electricity pylons were blown up.
PHRASAL VERB : be V-ed P
3.
If a film or a piece of writing is blacked out , it is prevented from being broadcast or published, usually because it contains information which is secret or offensive.
TV pictures of the demonstration were blacked out.
= censor
PHRASAL VERB : usu passive , be V-ed P
4.
If you black out a piece of writing, you colour over it in black so that it cannot be seen.
U.S. government specialists went through each page, blacking out any information a foreign intelligence expert could use...
= censor
PHRASAL VERB : V P n (not pron) , also V n P
5.
If you black out the memory of something, you try not to remember it because it upsets you.
I tried not to think about it. I blacked it out.
= blot out
PHRASAL VERB : V n P , also V P n (not pron)
see also blackout