| Migration | Definition |
| ACTIVITY SPACE | the areal extent of a person's regularly visited places within a day |
| CHAIN MIGRATION | migration of people to a specific location because relatives or members of the same nationality previously migrated there |
| CYCLIC MOVEMENT | a closed route that is repeated annually or seasonally |
| DISTANCE DECAY | the diminishing in importance and eventual disappearance of a phenomenon with increasing distance from its origin |
| FORCED MIGRATION | permanent movement compelled usually by cultural factors |
| GRAVITY MODEL | a model that holds that the potenial use of a service at a particular location is directly related to the number of people in a location and inversely related to the distance people must travel to reach the service |
| INTERNAL MIGRATION | permanent movement within a particular country |
| INTERVENING OPPORTUNITY | the existence of a closer, less expensive opportunity for obtaining a good or service, or for a migration destination |
| MIGRATION PATTERN
| the patterns that people tend to move to |
| MIGRATORY MOVEMENT | denotes any movement by humans from one locality to another, sometimes over long distances or in large groups |
| PERIODIC MOVEMENT | motion that recurs over and over and the period of time required for each recurrence remains the same |
| PERSONAL SPACE | the "space bubble" or the kinesphere that one occupies; it includes all levels, planes, and directions both near and far from the body's center
|
| PLACE UTILITY | the desirability and usefulness of a place to the individual or to a group |
| PUSH-PULL FACTORS | the push factor involves a force which acts to drive people away from a place and the pull factor is what draws them to a new location
|
| REFUGEE | a refugee is a person who is seeking asylum in a foreign country in order to escape persecution, war, terrorism, extreme poverty, famines, and natural disaster |
| SPACE-TIME PRISM | the volume of space and length of time within which activities must be confined |
| STEP MIGRATION | a series of small, less extreme locational changes occur in steps |
| TRANSHUMANCE | the seasonal migration of livestock between mountains and lowland pastures |
| TRANSMIGRATION | the belief in the successive reincarnation of the soul in different bodies |
