As in, independent judical system, I would presume. Eg in the US, I believe, the president can put his guy as a supreme judge, but cannot remove him and cant really tell them what to do. On the other hand, in Russia, every time a major case happens, somewhere, a law school graduate shoots their brains out, as everything they learned in those years gets publicly humiliated and disregarded at a whim of crooks in power.