Pronunciation: (mil'ing),[key] —n. 1. an act or instance of subjecting something to the operation of a mill.
2. an act or process of producing plane or shaped surfaces with a milling machine.
3. Coining. a. an act or process of making a raised edge on a coin or the like.
b. an act or process of making narrow, radial grooves on such a raised edge.
c. a number of grooves so made.
4. Slang.a beating or thrashing.