a hard brittle usu transparent or translucent substance formed by melting sand or some other form of silica with metallic oxides and other ingredients and cooling the mixture rapidly
a substance resembling glass, esp in hardness and transparency
(used before a noun) relating to or made of glass
a glass door
something made of glass, e.g.:
a glass drinking vessel
a mirror
a barometer
an optical instrument, e.g. a magnifying glass, for viewing objects not easily seen
articles made of glass; glassware
the quantity held by a glass drinking vessel
glassful (pl glassfuls) noun
glassware noun
glassless adj
glasslike adj
[Old English glæs]