Ma'anar ƙamus na kalmar "containership" babban jirgin ruwa ne da aka kera musamman don ɗaukar daidaitattun kwantena na tsaka-tsaki, waɗanda ake amfani da su don jigilar kayayyaki iri-iri zuwa nesa mai nisa. Waɗannan jiragen ruwa suna da babban ƙarfin ɗaukar kaya kuma an sanye su da kayan aiki na musamman don lodi da sauke kwantena yadda ya kamata. Kantunan kwantena sun kawo sauyi a kasuwancin duniya ta hanyar saukaka jigilar kayayyaki da rage tsadar kayayyaki.