noun (n)

• the extended spatial location of something(noun.location)

  Example:
  The farming regions of France.
  Regions of outer space.
  

  Synonym:
  part
  

  source: wordnet30
• a part of an animal that has a special function or is supplied by a given artery or nerve(noun.body)

  Example:
  In the abdominal region.
  

  Synonym:
  area
  

  source: wordnet30
• a large indefinite location on the surface of the Earth(noun.location)

  Example:
  Penguins inhabit the polar regions.
  

  source: wordnet30
• the approximate amount of something (usually used prepositionally as in `in the region of')(noun.quantity)

  Example:
  It was going to take in the region of two or three months to finish the job.
  

  Synonym:
  neighborhood
  

  source: wordnet30
• a knowledge domain that you are interested in or are communicating about(noun.cognition)

  Example:
  Here we enter the region of opinion.
  

  Synonym:
  realm
  

  source: wordnet30
• One of the grand districts or quarters into which any space or surface, as of the earth or the heavens, is conceived of as divided; hence, in general, a portion of space or territory of indefinite extent; country; province; district; tract.(noun)

  source: webster1913