Wikipedia:

Region

Summary:

most commonly a geographical term that is used in various ways among the different branches of geography. In general, a region may be seen as a collection of smaller units or as one part of a larger whole. Regions can be defined by physical ...  (44 of 3244 words, 1 image)

Link:

http://en.wikipedia.org/wiki/Region  [cite]

Wikipedia:

Region (disambiguation)

Summary:

Region, Regions or Regional can refer to: Region is a term used by contemporary geographers to describe an area of land or water that is part of a larger whole. Several types of geographic regions can be found at Region. RegionsAir, an airline based ...  (44 of 361 words, 19 senses)

Link:

http://en.wikipedia.org/wiki/Region (disambiguation)  [cite]

Random House:

region

Summary:

an extensive, continuous part of a surface, space, or body. | Usually, "regions". the vast or indefinite entirety of a space or area, or something ...  (24 of 198 words, 11 senses, pronunciation)

Link:

http://dictionary.infoplease.com/region  [cite]

Merriam-Webster:

region

Summary:

an administrative area, division, or district | the basic administrative unit for local government in Scotland | an indefinite area of the world or ...  (22 of 189 words, 11 senses, 1 etymology, pronunciation)

Link:

http://www.merriam-webster.com/dictionary/region  [cite]

Wiktionary:

region | regions [plural]

Summary:

Any considerable and connected part of a space or surface; specifically, a tract of land or sea of considerable but indefinite extent; a country; a district; in a broad sense, a place without special reference to location or extent but viewed as an ...  (43 of 165 words, 7 senses, pronunciation)

Link:

http://en.wiktionary.org/wiki/region  [cite]

Encarta:

region | regions [plural]

Summary:

a large land area that has geographic, political, or cultural characteristics that distinguish it from others, whether existing within one country or ...  (22 of 155 words, 7 senses, 1 etymology, pronunciation)

Link:

http://encarta.msn.com/dictionary 1861700454/definition.html  [cite]

Britannica:

region

Summary:

in the social sciences, a cohesive area that is homogeneous in selected defining criteria and is distinguished from neighbouring areas or regions by ...  (23 of 103 words)

Link:

http://www.britannica.com/EBchecked/topic/496048/region  [cite]