"Capital" basically is another word for money, and "capitalism" means a method by which that money can be used to Enable people to produce stuff and provide services. We've got a system in which some people have an enormous amount of money, most have a relatively small amount, and large numbers have virtually none.

The real issue isn't whether we operate a form of capitalism, but whether we should continue to have a system in which everything is grossly distorted by inequality.

Jeremy Corbyn is very much a capitalist. But one opposed to inequality. Tye same was true for that matter of Karl Marx.