Noun
1. the extended spatial location of something;
"the farming regions of France""religions in all parts of the world""regions of outer space"2. a part of an animal that has a special function or is supplied by a given artery or nerve;
"in the abdominal region"3. a large indefinite location on the surface of the Earth;
"penguins inhabit the polar regions"4. the approximate amount of something (usually used prepositionally as in `in the region of');
"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"5. a knowledge domain that you are interested in or are communicating about;
"it was a limited domain of discourse""here we enter the region of opinion""the realm of the occult"