1) Return to the normal structure and/or function, e.g. the subsidence of a pathologic process, as the subsidence of an inflammatory lesion or new growth; also, the size of the smallest element that can be separated from neighbouring elements. The term is used in optics, to describe imaging systems, in genetics and molecular biology, to define the degree of molecular detail on a physical map of DNA, ranging from low to high.

2) The separating of a chemical compound or mixture into its constituents. 2: The process or capability of making distinguishable the individual parts of an object, closely adjacent optical images, or sources of light.

3) The subsidence of a pathological state (as inflammation).