blank ammunition; blank cartridge; firing a blank
Refers to ammunition that produces noise and flash but no projectile, or a gun loaded with such ammunition. Often used in military, police, and ceremonial contexts. Compare 空包 (くうほう), which specifically means blank cartridge.
See also: 空包
We use blank ammunition in training.
Blanks were fired at the ceremony.
The police officer fired a blank to intimidate the suspect.
The sound of blank shots echoed at the ceremony.