A line separating land territory or maritime zones of two States or subparts of States. It can also refer to a region that is found at the margin of settled and developed territory.
The movement of a person or a group of persons, either across an international border (international migration), or within a State (internal migration). It is a population movement, encompassing any kind of movement of people, whatever its length, composition and causes; it includes migration of refugees, displaced persons, economic migrants and persons moving for other purposes, including family reunification.
In the EU context, a broader-term of an immigration and emigration, i.e. the action by which a person either: