1. a glass for drinking water • Hypernyms: glass, drinking glass 2. gauge for indicating the level of water in e.g. a tank or boiler or reservoir • Syn: water gauge, water gage • Hypernyms: gauge, gage • Hyponyms: water level 3. a viscous glass consisting of sodium silicate in solution; used as a cement or as a protective coating and to preserve eggs • Syn: soluble glass, sodium silicate • Hypernyms: glass 4. clock that measures time by the escape of water • Syn: water clock, clepsydra • Hypernyms: clock