1.Definition: a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.
Related Noun(s):gageCategory: Objects
2.Definition: accepted or approved instance or example of a quantity or quality against which others are judged or measured or comparedCategory: General
3.Definition: diameter of a tube or gun barrel
4.Definition: the distance between the rails of a railway or between the wheels of a trainCategory: General