# Definition:Directed Line Segment

## Definition

A **directed line segment** is a line segment endowed with the additional property of direction.

It is often used in the context of applied mathematics to represent a vector quantity.

## Sources

- 1961: I.M. Gel'fand:
*Lectures on Linear Algebra*(2nd ed.) ... (next): $\S 1$: $n$-Dimensional vector spaces