The laws and regulations put in place by a government regarding who is allowed to enter and stay in a country, as well as conditions for naturalization (becoming a citizen).
Related terms
Naturalization: The process through which foreign individuals become citizens of another country.
Border Control: Measures taken by a government to regulate movement across its borders and enforce immigration laws.
Visa: An official document issued by a country granting permission for an individual to enter, stay temporarily, or work within its borders.