Immigration is the act of immigrating; the passing or coming into a country for the purpose of permanent residence.
We can define an immigrant as a person who migrates from another country, usually for permanent residence.
We consider Immigration in the most simplistic terms means: the movement of people between different countries. The constant movement of peoples has been common throughout human history. However, modern immigration requires long-term, legal, permanent residence.
Short-term visitors and tourists are not considered immigrants. Immigration through international borders that violates the laws of the destination country is considered illegal immigration. An illegal immigrant is a foreign person whom either illegally crossed an international political border or a foreign person who legally entered a country but overstayed their visa in order to live or work in the country. Seasonal labor migration is considered non-permanent immigrants in nature but is still treated as a form of immigration.