Immigration is the international movement of people into a destination country of which they are not natives or where they do not possess citizenship in order to settle or reside there, especially as permanent residents or naturalized citizens, or to take-up employment as a migrant worker or temporarily as a foreign worker.

Employment is a relationship between two parties, usually based on a contract where work is paid for, where one party, which may be a corporation, for profit, not-for-profit organization, co-operative or other entity is the employer and the other is the employee.

Citizenship is the status of a person recognized under the custom or law as being a legal member of a sovereign state.

The term "migrant worker" has different official meanings and connotations in different parts of the world.

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When people cross national borders during their migration, they are called migrants or immigrants from the perspective of the country which they enter.

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From the perspective of the country which they leave, they are called emigrant or outmigrant.


Sociology designates immigration usually as migration.

Sociology is the study of social behavior or society, including its origins, development, organization, networks, and institutions.


Immigrants are motivated to leave their former countries of citizenship, or habitual residence, for a variety of reasons, including a lack of local access to resources, a desire for economic prosperity, to find or engage in paid work, to better their standard of living, family reunification, retirement, climate or environmentally induced migration, exile, escape from prejudice, conflict or natural disaster, or simply the wish to change one's quality of life.

Family reunification is a recognized reason for immigration in many countries because of the presence of one or more family members in a certain country, therefore, enables the rest of the divided family or only specific members of the family to immigrate to that country as well.

Standard of living refers to the level of wealth, comfort, material goods, and necessities available to a certain socioeconomic class in a certain geographic area, usually a country.

To be in exile means to be away from one's home, while either being explicitly refused permission to return or being threatened with imprisonment or death upon return.


Commuters, tourists and other short-term stays in a destination country do not fall under the definition of immigration or migration, seasonal labour immigration is sometimes included.


In 2013 the United Nations estimated that there were 231,522,215 immigrants in the world.

The United Nations is an intergovernmental organization to promote international co-operation.


The United Arab Emirates has the largest proportion of immigrants in the world, followed by Qatar.

Qatar, officially the State of Qatar, is a sovereign country located in Western Asia, occupying the small Qatar Peninsula on the northeastern coast of the Arabian Peninsula.

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