glass

Concise Oxford English Dictionary © 2008 Oxford University Press:
glass/ɡlɑːs/

▶noun

• 1 a hard, brittle substance, typically transparent or translucent, made by fusing sand with soda and lime.

  ■ ornaments and other articles made from glass.

  ■ greenhouses or cold frames considered collectively.

• 2 a drinking container made of glass.

• 3 a lens or optical instrument, in particular a monocle or a magnifying lens.

• 4 chiefly Brit. a mirror.

▶verb

• 1 cover or enclose with glass.

• 2 Brit. informal hit in the face with a beer glass.

• 3 scan (one's surroundings) with binoculars.

– derivatives
glassful noun (pl. glassfuls),
glassless adjective,
glass-like adjective.

– origin OE glæs, of Gmc origin.