| A | B |
|---|
| Activity space | Places in a local area where cyclic movement takes place. |
| Asylum seeker | Someone who has migrated to another country in the hop of being recognized as a refugee. |
| Brain drain | Large-scale emigration by talented people. |
| Chain migration | Migration of people to a specific location because relatives or members of the same nationality previously migrated there. |
| Circulation/Periodic movement | Short-term, repetitive, or cyclical movements that recur on a regular basis. |
| Counterurbanization | Net migration from urban to rural areas in more developed countries. |
| Emigration | Migration from a location. |
| Floodplain | The area subject to flooding during a given number of years, according to historical trends. |
| Forced migration | Permanent movement, usually compelled by cultural factors. |
| Guest worker | A term once used for a worker who migrated to the developed countries of Northern and Western Europe, usually from Southern and Eastern Europe or from North Africa, in search of a higher-paying job. |
| Immigration | Migration to a new location. |
| Internal migration | Permanent movement within a particular country. |
| Internally displaced person (IDP) | Someone who has been forced to migrate for similar political reasons as a refugee but has not migrated across an international border. |
| International migration | Permanent movement from one country to another. |
| Interregional migration | Permanent movement from one region of a country to another. |
| Intervening obstacle | An environmental or cultural feature of the landscape that hinders migration. |
| Intervening opportunity | The presence of a nearer, more favorable circumstance that greatly diminishes the attractiveness of sites farther away. |
| Intraregional migration | Permanent movement within one region of a country. |
| Migration | A form of relocation diffusion involving a permanent move to a new location. |
| Migration transition | A change in the migration pattern in a society that results from industrialization, population growth, and other social and economic changes that also produce the demographic transition. |
| Mobility | All types of movement between locations. |
| Net migration | The difference between the level of immigration and the level of emigration. |
| Pull factor | A factor that induces people to move to a new location. |
| Push factor | A factor that induces people to leave old residences. |
| Quotas | In reference to migration, laws that place maximum limits on the number of people who can immigrate to a country each year. |
| Refugees | People who have been forced to migrate from their homes and cannot return for fear of persecution because of their race, religion, nationality, membership in a social group, or political opinion. |
| Step migration | Migration to a distant destination that occurs in stages. |
| Undocumented/Unauthorized immigrants | People who enter a country without proper documents to do so. |
| Voluntary migration | Permanent movement undertaken by choice. |
