immigration noun definition in Immigration topic from the Oxford Advanced Learner's Dictionary

immigration

 noun: Immigration topic
1 the process of coming to live permanently in a country that is not your own; the number of people who do this laws restricting immigration into the US a rise/fall in immigration immigration officers2 (also immigration control) the place at a port, an airport, etc. where the passports and other documents of people coming into a country are checked to go through immigration

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