# Definition:Dimension (Measurement)/Units

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## Definition

Compare with units of measurement.

This concept of **dimension** is more abstract than that of units, which are standard quantities of the particular dimension in question.

### Examples

- Displacement has dimension $L$.

- Velocity has dimension $L T^{-1}$ (change in displacement, that is length traveled, per unit of time).

- Acceleration has dimension $L T^{-2}$ (change in velocity per unit of time).

- Force has dimension $M L T^{-2}$ (mass times acceleration, from Newton's Second Law of Motion).