region

region is one of the 1000 most common headwords.

regard - region - relation

region is on the Academic Word List.

Noun

Region is on the Academic Vocabulary List.

(countable) A region is an area of land or of the body.
The fishing problems have been happening only in the Atlantic coast region.

The southern regions of Japan are warm and tropical.

If we do an operation in this region of the brain, you may lose your ability to speak.
(countable) A region is any connected part of a space or surface. This definition is useful in geometry.
In Euclidean space, a convex set is a region which has a geometric definition.