In music, the sequence of tones that a piece of music principally uses. A composition in the key of C-major uses the C-major scale, made up of the white keys on a piano.
A system of marks set at fixed intervals, used as a standard for measurement.
On a map, plan, or chart, a scale indicates the proportion between the representation and what it represents, such as the legend “One inch equals twenty miles” on a map.
Temperature scales divide up the range of temperatures into equal degrees.