car ‧ tridge /ˈkɑːtrɪdʒ $ ˈkɑːr-/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Origin: cartage 'cartridge' (16-17 centuries) , from French cartouche 'gun cartridge with a paper case' , from Italian cartoccio , from carta ; ⇨ ↑ card 1 ]
1 . a small container or piece of equipment that you put inside something to make it work:
computer game cartridges
an ink cartridge for a printer
2 . a tube containing explosive powder and a bullet that you put in a gun SYN shell