1. Social integration is the process whereby a minority group, particularly an ethnic minority, adapts to the host society and where it is accorded equal rights with the rest of the community. Assimilation is integration such that the immigrants' culture is lost.

2. Economic integration can be the breaking down of trade barriers between nations in order to set up a common market. The term is also applied to a firm which takes control of all the stages of production. A major example is an integrated iron and steel works comprising coke ovens, blast furnaces, steel forges, and a strip mill. Horizontal integration is the central organization of all units at the same stage of production, while vertical integration is the integration of units at all stages of production.

3. In Geographic Information Systems, the fusion of data from different systems and sources to supply new information.