Definition:Length


 * Length (Linear Measure): a formal comparison between the spatial extent of a geometric figure in a specified direction.


 * Length of a Sequence: the number of terms contained in a finite sequence.


 * Length (Formal Systems): the number of symbols in a string.


 * Length (Graph Theory): the number of edges in a walk (counting repeated edges as many times as they appear).


 * Length of an Orbit: The number of elements contained in an orbit of a group action.