glass

noun

• 1 [mass noun] a hard, brittle substance, typically transparent or translucent, made by fusing sand with soda and lime and cooling rapidly. It is used to make windows, drinking containers, and other articles: the screen is made from glass [as modifier]:a glass door
• a substance similar to glass which has solidified from a molten state without crystallizing: the black volcanic glass makes the beaches sparkle
• glassware: we sell china and glass
• greenhouses or cold frames considered collectively:lettuces grown under glass

• 2a drinking container made from glass:a beer glass
• the contents of a glass:have a glass of wine

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

• 4chiefly British a mirror: she couldn’t wait to put the dress on and look in the glass
• dated a weather glass.
• archaic an hourglass: every hour the ship’s glass was turned

verb

• 1cover or enclose with glass:the inn has a long gallery, now glassed in

• 2(especially in hunting) scan (one’s surroundings) with binoculars:the first day was spent glassing the rolling hills

• 3British informal hit (someone) in the face with a beer glass: he glassed the landlord because he’d been chatting to Jo