Glass

n. 1 a (often attrib.) hard, brittle, usu. transparent substance, made by fusing sand with soda and lime etc. b substance of similar properties. 2 glass objects collectively. 3 a glass drinking vessel. b its contents. 4 mirror. 5 glazed frame for plants. 6 barometer. 7 covering of a watchface. 8 lens. 9 (in pl.) a spectacles. b binoculars. v. (usu. as glassed adj.) fit with glass. glassful n. (pl. s). [Old English]