Definitions of region:

• noun:   the extended spatial location of something

  Example: "The farming regions of France"

• noun:   a large indefinite location on the surface of the Earth

  Example: "Penguins inhabit the polar regions"

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

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

• noun:   a part of an animal that has a special function or is supplied by a given artery or nerve

  Example: "In the abdominal region"

• noun:   a knowledge domain that you are interested in or are communicating about

  Example: "Here we enter the region of opinion"