noun / verb
gauge
GAYJ/ɡeɪdʒ/
A reference measure used to establish an amount or dimension.
The rain gauge measures rainfall with a clearly marked scale.

Etymology
A gauging rod provided a concrete reference for measurement. The word came to mean a fixed standard of measure and then an instrument used for measuring.
In context
say you want to know the level of the battery of in the battery pack well there's no gauge
More examples
- Check the wire's gauge before choosing a connector.
- Both railroad lines use the same track gauge.
- The machinist gauges the thickness of each metal sheet.
Forms
gauge · gauges · gauged · gauging