adj.1. Of or relating to a large geographic region.
2. Of or relating to a particular region or district.
3. Of or affecting a region of the body: regional pain.
4. Of or characteristic of a form of a language that is distributed in identifiable geographic areas and differs in pronunciation, grammar, or vocabulary from the standard form.
n. Something, such as a magazine or a company branch, that serves a region: "earlier attempts to launch glossy regionals for women" (Business Week).