Dictionary.com defines immigrants as people who have undertaken a migration to a different country. Typically, the word is used to indicate those looking to reside permanently in the country to which they have migrated.
According to the Encyclopaedia Britannica, immigrants have typically been of benefit to countries by affecting cultural, social and economic conditions positively. Still, there has historically been discrimination against immigrants, despite their role, for example, in Europe's reconstruction after World War II. The multicultural societies found in many states have resulted from the process of immigration. Different countries have different policies regarding how and to what extent immigrants are expected to assimilate into the culture of their new country.