Learner's definition of REGION
1 [count] : a part of a country, of the world, etc., that is different or separate from other parts in some way
— often + of
The bird returns to this region every year.
The plant grows in tropical regions. [=areas]
He's the company sales manager for the entire Southwest region.
the agricultural/coastal/mountainous regions of the country
the Amazon region of South America
the desert regions of the world
the winemaking regions of France
the unknown regions of outer space
2 [count] : a place on your body : an area that is near a specified part of your body — often + of 3 the regions British : the parts of a country that are not close to the capital city
(somewhere) in the region of