try not to look it up, just give your personal definition of what a super computer is in your opinion it can be a really cool looking personal computer (that one case that was posted here some time ago that had the components encased individually), that laptop with something awesome about it (for example the bullet proof/splash water resistance of the tough book series) or simply one of those huuuuge processing factories from the 80's or whatever just make a definition as if you would find it in a dictionary about your specific choice
It's a computer dedicated to performing specific processing tasks. It is not a Personal computer, as it can't really be used for anything like that. It's used for rendering and doing calculators and shit.
A supercomputer is a computer that has a lot cores so it can process stuff in parallel. Pure, lazy functional languages are often used to write programs for it.
A bunch of Playstation 2s put together, or a computer created through quantum engineering, now thats super.
A supercomputer: its the one that you cannot afford... or if you finally buy it it stops being "super" after a couple of days.