noun
region
REE-juhn/ˈriːdʒən/
An area or part of a larger whole.
The highlighted region forms one part of the larger map.

Etymology
Latin regio could mean both a boundary line and a district. These meanings connect a region with a portion of space distinguished from the larger territory around it.
In context
trying to approach the issue on many different levels we've also seen in the san francisco bay area they're working on an adaptation atlas where they actually are dividing the region based on geographic and risk context
More examples
- Pain spread through the lower back region.
- The map divides the country into regions.
- Each region has a distinct climate.
Forms
region · regions
regional adjective — relating to a particular area