Collins COBUILD Advanced Learner's English Dictionary - immigration

Frequency: The word is one of the 3000 most common words in English. 1. Immigration is the coming of people into a country in order to live and work there. The government has decided to tighten its immigration policy. N-UNCOUNT 2. Immigration or immigration control is the place at a port, airport, or international border where officials check the passports of people who wish to come into the country. N-UNCOUNT