A naive question about [WKB][1] approach. It is dubbed to be a "semiclassical" method. What is precisely mean in quantum mechanical context to be "semiclassical"? Wikipedia states that generally semiclassical methods just mean that one part of system is described classically, another quantum mechanically. But what is in WKB precisely the **classical** part?

Isn't it naively thinking purely non-classical since we expand the solution ansatz in $\hbar$? Where sits the precise reason to call it nevetheless "semiclassical" approach? 

Can from this example an abstract reason or indication be extracted when an approximation method applied to a quantum mechanical system  should be called to be "semiclassical"?



Addendum/ sidemark: I read (eg [wiki][2] again) that the "One- Loop Approximation" is also regarded in certain sense as semiclassical. (namely the latter mean the breaking of the expansions of entities in powers of coupling constant after terms corresponding to a simple loop wrt Feynman graphs)
Why? After all, what is "classical" component there?


  [1]: https://en.wikipedia.org/wiki/WKB_approximation
  [2]: https://en.wikipedia.org/wiki/Semiclassical_physics