In law, an alien is a person who is not a native or naturalized citizen of the land where they are found. Types of "alien" persons are:

• An alien who is legally permitted to remain in a country (which is foreign to him/her) on specified terms may be called a "legal alien" of that country.
• An alien who has temporary or permanent residence in a country (which is foreign to him/her) may be called a "resident alien" of that country.
• A visitor with the legal right to visit a country (which is foreign to him/her) may be called a "nonresident alien" of that country.
• The term illegal alien describes foreign nationals who are not allowed to stay in the country. (See illegal immigration)
• An enemy alien is an alien who is designated as an enemy. (See enemy combatant).

See also

• Immigration
• Naturalization
• Gaikokujin
• California Alien Land Law of 1913
• Alien and Sedition Acts
• Alien

Immigration law | Legal categories of people

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