Meaning of roof knocking | Babel Free
Definitions
The practice of dropping a nonexplosive or low-yield device on a target around 10 to 15 minutes before a bombing in order to caution any civilians present to flee, so as to minimize civilian casualties.
uncountable
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.