1 a small tube that contains explosive powder and a bullet. You put a cartridge into a gun when you want to fire it. （枪的）弹药筒，子弹匣

2 a closed container that holds sth that is used in a machine, for example film for a camera, ink for printing, etc. Cartridges can be removed and replaced when they are finished or empty. 密封容器（比如胶卷筒、油墨筒等用完后可以替换的容器）