What is define parabellum?

Parabellum is a Latin term which means “prepare for war.” It is often used in the context of weaponry and ammunition, specifically in reference to the 9mm Parabellum cartridge. This cartridge is commonly used in firearms such as pistols, submachine guns, and carbines. The 9mm Parabellum cartridge was developed by the German arms manufacturer DWM in 1902, and is widely used in both military and civilian applications around the world. The term parabellum is also often used in a more general sense to refer to the need to be prepared for conflict or difficult situations, whether they be physical, psychological, or otherwise.