[re.gion] n [ME, fr. MF, fr. L region-, regio, fr. regere to rule] (14c) 1: an administrative area, division, or district; esp: the basic administrative unit for local government in Scotland
2. a: an indefinite area of the world or universe "few unknown ~s left on earth" b: a broad geographical area distinguished by similar features "the Appalachian ~" c (1): a major world area that supports a characteristic fauna (2): an area characterized by the prevalence of one or more vegetational climax types 3 a: any of the major subdivisions into which the body or one of its parts is divisible b: an indefinite area surrounding a specified body part "a pain in the ~ of the heart"
4: a sphere of activity or interest: field
5: any of the zones into which the atmosphere is divided according to height or the sea according to depth
6: an open connected set together with none, some, or all of the points on its boundary "a simple closed curve divides a plane into two ~s"