| Term | Definition |
| Cultural Deffusion | The spread, mixing, and changing of cultures. |
| Immigrants | People who settle in a country they weren't born in. |
| Ellis Island | Immigration processing center that open in New York Harbor in 1892 |
| Undocumented Workers | Immigrants who come into the country without the government's permission |
| Migration | large-scale permanent movements of people |
| Refugees | People who flee their country because of persecution or danger. |
| Urbanization | The movement to cities, growth of cities |
| Urban Area | Cities & towns |
| Rural area | "In the country", often farms |
| Push Factors | Things that make you move for your survival |
| Pull factors | Opportunities for a better life that encourage you to move |