Englishfor English speakers
region
Noun
—
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.
—
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.
boundary
Noun
—
A boundary is the line around something's outside edge.
The elephants have to live within the boundary of the park or risk being shot.
There have been many times in their lives when the boundaries between their personal and professional lives have disappeared.
More manufactured goods are crossing international boundaries every day.
An international commission that regulates the boundary waters between the U.S. and Canada.