구조 is structure, which is arrangement and organization of related objects as system of certain entities. It could be building or system of sciences, which has organization of related objects.
In philosophy, it is broad term, used for specifying some system of entities concerned by philosophical endeavor. The analytic philosophy focuses on lingual structure, social philosophy focuses on social structure, and philosophy of mathematics focuses on logical structure on so on.
It is system, so meaningful topic in philosophical endeavor. Philosophers observe certain set of systems and formulate the close look at the structure and generate concepts dealing with them. In turn, it is conceived as lingual forces behind languages, or human rights behind social structure and coherent and necessity in logical structures.
There are more variations in structure as focus of philosophy. When someone is experienced by harsh condition of social structure, it entails the constituents of experiences such as politics, carried by language and timeness. Philosophy is surely the science of debating on structures variated by topical delineation and synthetics, it makes philosophy as deeper sense of thinking and to be the status of science about the everything around us.