Immigration is the act of moving to or settling in another country or region, temporarily or permanently. An immigrant is someone who intends to reside permanently, and not a casual visitor or traveler. Immigration means "in-migration" into a country, and is the reverse of emigration, or "out-migration." The long term and/or permanent movement of human population in general, whether into, out of, or within countries (or before the existence of recognized countries) is regarded as migration.