Topic: LABOUR RELATIONS, UNIONS
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black3 [transitive]
1 British EnglishBEL if a trade union blacks goods or a company, it refuses to work with them : 
The union has blacked all non-urgent work.
The union has blacked all non-urgent work.2CC old-fashioned to make something black
black out
phrasal verb1MI to become unconscious [= faint, pass out]: For a few seconds, he thought he was going to black out.
For a few seconds, he thought he was going to black out.2TCN to put a dark mark over something so that it cannot be seen : The censors had blacked out several words.
black something ↔ out
The censors had blacked out several words.3PM to hide or turn off all the lights in a town or city, especially during war
black something ↔ out
[↪ blackout]
