Free US Law Dictionary

Immigration

Immigration refers to the movement of people between countries. While the movement of people has existed throughout human history at various levels, modern immigration implies long-term, legal, permanent residence. Short-term visitors and tourists are considered non-immigrants (see expatriate). Immigration across national borders in a way that violates the immigration laws of the destination country is termed illegal immigration. Under this definition, an illegal immigrant is a foreigner who either illegally crossed an international political border, be it by land, water, or air, or a foreigner who legally entered a country but nevertheless overstays his/her visa in order to live and/or work therein. Seasonal labour migration, while generally non-permanent in nature (typically for periods of less than a year), is often treated as a form of immigration.

The modern concept of immigration is related to the development of nation-states and nationality law. Citizenship in a nation-state confers an inalienable right of residence in that state, but residency of non-citizens is subject to conditions set by immigration law. The emergence of nation-states made immigration a political issue: by definition it is the homeland of a nation defined by shared ethnicity and/or culture.

The global volume of immigration is high in absolute terms, but low in relative terms. The International Integration and Refugee Association estimated 190 million international migrants in 2005, about 3 percent of global population. The other 97 percent still live in the country in which they were born.[citation needed] The Middle East, some parts of Europe, small areas of South East Asia, and a few spots in the West Indies have the highest numbers of immigration population recorded by the UN Census 2005.