Definition of region
1
: an administrative area, division, or district
especially
: the basic administrative unit for local government in Scotland
2a
: an indefinite area of the world or universe
b
: a broad geographic area distinguished by similar features
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
3a
: 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 region 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 regions
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Merriam-Webster unabridged
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Time Traveler for region
The first known use of region was in the 14th century
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