Question

what do you mean by immigration?

Answer 1

Suppose there are two places A and B when a person move from A to B it is emigration but for the place B where he is going is immigration

Answer 2

The process of coming to live permanently in a country that is not your own.
OR
A person who comes to a country to take up permanent residence.A plant or animal that becomes established in an area where it was previously unknown.