Other forms: expatriations
Expatriation is the process of leaving your country and living in a new one, or the act of forcing a person to do this. If you decide to pack up your things and move to the remote island nation of Kiribati, that's expatriation.
When a fairy tale king banishes a princess from the kingdom, it's one kind of expatriation—you could also call it "exile" or "deportation." Then there's the expatriation that happens when someone chooses to move from one country to another. A U.S. citizen might attend college in Canada, then stay and become a Canadian citizen afterward, for example. Expatriation comes from the French expatrier, "banish," from ex-, "out of," and the Latin patria, "native land."