Region.
Region. Any defined geographic land area identifiable by geological, political, or surveyed boundaries. A region may consist of any of the following:
(1) A national entity (country);
(2) Part of a national entity (zone, county, department, municipality, parish, Province, State, etc.)
(3) Parts of several national entities combined into an area; or
(4) A group of national entities (countries) combined into a single area.