a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc. | a glass for drinking water |
the distance between the rails of a railway or between the wheels of a train | gauge for indicating the level of water in e.g. a tank or boiler or reservoir |
the thickness of wire | clock that measures time by the escape of water |
diameter of a tube or gun barrel | a viscous glass consisting of sodium silicate in solution; used as a cement or as a protective coating and to preserve eggs |
accepted or approved instance or example of a quantity or quality against which others are judged or measured or compared | |