Definition of water glass
1 : a glass vessel (such as a drinking glass) for holding water
2 : an instrument consisting of an open box or tube with a glass bottom used for examining objects in or under water
3 : a substance that consists usually of the silicate of sodium, is found in commerce as a glassy mass, a stony powder, or dissolved in water as a viscous syrupy liquid, and is used especially as a cement, a protective coating, and as a fireproofing agent
Our team at The Usage has selected the best water bottles of 2021.
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
Ask the Editors