1. The act or process of forming or creating a corporation ; the formation of a legal or political body, with the quality of perpetual existence and succession, unless limited by the act of incorporation .2. The method of making one document of any kind become a part of another separate document by referring to tlie former in the latter, and declaring that the former shall be taken and considered as a part of the latter the same as if it fully set out therein. This is more fully described as ” incorporation by reference .” If the one document is copied at length in the other, it Is called “actual incorporation.”3. In the civil law . The union of one domain to another.