n. Political division of an area into partially autonomous regions.n. Advocacy of such a political system.n. Loyalty to the interests of a particular region.n. A feature, such as an expression, a pronunciation, or a custom, that is characteristic of a geographic area.n. The use of regional characteristics, as of locale, custom, or speech, in literature or art.n. A policy whereby the interests of a nation in world affairs are defined in terms of particular countries or regions.