There are various contexts in which the word Regionalism is used like in politics, art, international relations, literature, and architecture. The general meaning of regionalism is the interests of a group of regions which can be a political division, country subdivision, political power etc. In this context regionalism is the opposite of the nationalism. It refers to enhancing influence of a region on the basis of the political power, economic resources etc. For understanding regionalism in the world click on the link:
Regionalism
Regionalism