region
re.gion \'re--j*n\ n [ME, fr. MF, fr. L region-, regio, fr. regere to rule] 1: an administrative area, division, or district 2a: a major indefinite division of inanimate creation 2b: a sphere of activity or interest : FIELD 3a: an indefinite area 3b: a broad homogeneous geographical area 3c1: a major world area that supports a characteristic fauna 3c2: an area characterized by prevalence of one or more vegetational climax types 4: one of the major subdivisions into which the body or one of its parts is divisible 5: one of the zones into which the atmosphere is divided according to heigh t or the sea according to depth
Webster's English Dictionary