| A | B |
| migration | permanent move to a new location |
| emigration | migration from a location |
| immigration | migration to a location |
| net migration | difference between number of immigrants and emigrants |
| mobility | all types of movements from one place to another |
| circulation | cyclical movements that recur on a regular basis |
| push factor | induces people to move out of their present location |
| pull factor | induces people to move into a new locaiton |
| refugees | people who have been forced to migrate from their homes and cannot return for fear of persecution |
| floodplain | area subject to flooding during a specific number of years |
| intervening obstacle | environmental or cultural feature that hinders migration |
| international migration | permanent movement from one country to another |
| internal migration | permanent movement within the same country |
| interregional migration | movement from one region of a country to another |
| intraregional migration | movement within one region |
| voluntary migration | migrant has chosen to move for economic improvement |
| forced migration | migrant was compelled to move by cultural factors |
| migration transition | changes in a society comparable to those in the demographic transition |
| unauthorized immigrants | have entered a country without proper documentation |
| chain migration | migration of people to a specific place because relatives or members of the same nationalith previously migrated there |
| quotas | maximum limits |
| brain drain | large-scale emigration by talented people |
| guest workers | citizens of one country who work in another |
| counterurbanization | net migration from urban to rural areas |