What is the meaning of region?

noun

• The extended spatial location of something.
  • usage: "the farming regions of France"; "religions in all parts of the world"; "regions of outer space"
  • synonyms: part
• A part of an animal that has a special function or is supplied by a given artery or nerve.
  • usage: "in the abdominal region"
  • synonyms: area
• A large indefinite location on the surface of the Earth.
  • usage: "penguins inhabit the polar regions"
• The approximate amount of something (usually used prepositionally as in `in the region of'. )
  • usage: "it was going to take in the region of two or three months to finish the job"; "the price is in the neighborhood of $100"
  • synonyms: neighborhood
• A knowledge domain that you are interested in or are communicating about.
  • usage: "it was a limited realm of discourse"; "here we enter the region of opinion"; "the realm of the occult"
  • synonyms: realm