naturalization

The act of naturalizing, or the state of being naturalized; specifically, in law, the act of receiving an alien into the condition, and investing him with the rights and privileges, of a natural subject or citizen.

The act or process of naturalizing, esp. of investing an alien with the rights and privileges of a native or citizen; also, the state of being naturalized.

The action of naturalizing somebody.

The admission or adoption of foreign words or customs into general use.

The introduction and establishment of an animal or plant into a place where it is not indigenous.