black something out

Từ điển Oxford Advanced Learner 8th

ˌblack sthˈout derived
1. to make a place dark by turning off lights, covering windows, etc
•A power failure blacked out the city last night.
•a house with blacked out windows
related noun ↑blackout
2. to prevent sth such as a piece of writing or a television broadcast from being read or seen
•Some lines of the document have been blacked out for security reasons.
Main entry: ↑black_derived