Region

noun
1.
an extensive, continuous part of a surface, space, or body:
a region of the earth.
2.
Usually, regions. the vast or indefinite entirety of a space or area, or something compared to one:
the regions of the firmament; the regions of the mind.
3.
a part of the earth’s surface (land or sea) of considerable and usually indefinite extent:
a tropical region.
4.
a district without respect to boundaries or extent:
a charming region in Connecticut.
5.
a part or division of the universe, as the heavens:
a galactic region.
6.
a large indefinite area or range of something specified; sphere:
a region of authority.
7.
an area of interest, activity, pursuit, etc.; field:
studies in the region of logic.
8.
an administrative division of a city or territory.
9.
Zoogeography. a major faunal area of the earth’s surface, sometimes one regarded as a division of a larger area.
10.
Anatomy. a place in or a division of the body or a part of the body:
the abdominal region.
11.
Mathematics.

Also called domain. an open connected set.
the union of such a set and some or all of its boundary points.

noun
1.
any large, indefinite, and continuous part of a surface or space
2.
an area considered as a unit for geographical, functional, social, or cultural reasons
3.
an administrative division of a country: Tuscany is one of the regions of the Italian Republic
4.
a realm or sphere of activity or interest
5.
range, area, or scope: in what region is the price likely to be?
6.
a division or part of the boday: the lumbar region
7.
(in Scotland from 1975 until 1996) any of the nine territorial divisions into which the mainland of Scotland was divided for purposes of local government; replaced in 1996 by council areas See also islands council

region re·gion (rē’jən)
n.

An area of the body having natural or arbitrary boundaries.

A portion of the body having a special nervous or vascular supply.

A part of an organ with a special function.

see: in the neighborhood (region) of