To a large extent, "low-level" and "high-level" not binary categories but are a continuum. There are some languages that are clearly low-level (assembly, machine code), but beyond that there is really only "higher-level" and "lower-level".
As I see it, "lower-level" languages require code that looks more like the architecture of the computer, and "higher-level" languages accept code that looks more like the structure of the problem. But with that, languages can be high-level for one problem and low-level for another.
