Mobility is referred as social mobility when the movement is within the system of inequality. When the movement in a system of stratification results in a change of status and role without a change in social class position it is called horizontal mobility. If along with status and role the social class position also changes it will be called vertical mobility. Vertical mobility can however be either upward or downward.
There is also dimension of time. Changes can occur from one generation to another called inter-generational mobility or within one generation or one can be concerned with the amount of time ,inter or intra generational that it takes for persons to move from one set of position to another. Another dimension of mobility is related to the context or institution in which mobility occurs. Here reference is to occupational or educational mobility, mobility in general evaluation or changes in material resources of power.