conflict between social or economic classes (especially between the capitalist and proletariat classes); the active expression of a theoretical class conflict looked at from any kind of socialist perspective
Thenceforth, the class-struggle, practically as well as theoretically, took on more and more outspoken and threatening forms.
in Marxist theory, political opposition and the fight for economic power between capitalists (=the owners of property, factories etc) and the proletariat (=the workers)