region

UK: ˈriːdʒən | US: ˈriːdʒən

Definition
  1. n. a large, continuous area of land or space with definable characteristics

  2. n. an administrative division of a country or territory

  3. n. (biology) a part of the body with distinct functional or structural features

Structure
reg <rule>ion <noun suffix>
Etymology

Derived from Latin regio ("direction, boundary, district"), the word originally tied territorial divisions to the concept of governance (from rex, "king"). Over time, it broadened to denote any distinct area, whether geographic, political, or anatomical. The suffix -ion solidified its role as a noun.

Examples
  1. The Amazon rainforest spans a vast tropical region.

  2. Catalonia is an autonomous region in Spain.

  3. The brain’s frontal region controls decision-making.

  4. This wine is produced in the Bordeaux region of France.

  5. The government invested in renewable energy for the northern region.