an extensive, continuous part of a surface, space, or body: a region of the earth.
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.
a part of the earth's surface (land or sea) of considerable and usually indefinite extent: a tropical region.
a district without respect to boundaries or extent: a charming region in Connecticut.
a part or division of the universe, as the heavens: a galactic region.
a large indefinite area or range of something specified; sphere: a region of authority.
an area of interest, activity, pursuit, etc.; field: studies in the region of logic.
an administrative division of a city or territory.
Zoogeography. a major faunal area of the earth's surface, sometimes one regarded as a division of a larger area.
Anatomy. a place in or a division of the body or a part of the body: the abdominal region.
Also called domain. an open connected set.
the union of such a set and some or all of its boundary points.

1300–50; Middle English < Anglo-French regiun < Latin regiōn- (stem of regiō) direction, line, boundary, equivalent to reg(ere) to rule + -iōn- -ion

underregion, noun

1. area, section, portion. 4. locale, site, tract, quarter. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
region (ˈriːdʒən)
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.  See also islands council (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
[C14: from Latin regiō, from regere to govern]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

early 14c., from Anglo-Fr. regioun, O.Fr. region, from L. regionem (nom. regio) "direction, boundary, district, country," from regere "to direct, rule" (see regal).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

region re·gion (rē'jən)

  1. An area of the body having natural or arbitrary boundaries.

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

  3. A part of an organ with a special function.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Idioms & Phrases


see in the neighborhood (region) of.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Encyclopedia Britannica


in the social sciences, a cohesive area that is homogeneous in selected defining criteria and is distinguished from neighbouring areas or regions by those criteria. It is an intellectual construct created by the selection of features relevant to a particular problem and the disregard of other features considered to be irrelevant. A region is distinguished from an area, which is usually a broader concept designating a portion of the surface of the Earth. Area boundaries are arbitrary, established for convenience. Regional boundaries are determined by the homogeneity and cohesiveness of the section

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Often, you hear weather forecasters refer to a storm or low-pressure area
  moving toward your region.
Once beautiful but sleepy, this region is now beautiful but sophisticated.
He said that the roses recommended for each region actually do well across all
  the climates within the region.
Local tax and shipping charges will be applied by region.
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