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English definition of “glass”

glass

noun uk   /ɡlɑːs/ us    /ɡlæs/

glass noun (SUBSTANCE)

A1 [U] a hard, transparent material, used to make windows, bottles, and other objects: coloured/broken glass a glass jar/dish/ornament It's a huge window made from a single pane of glass. [U] objects made from glass when thought of as a group: The museum has a fine collection of valuable glass. under glass in a glasshouse: In cool climates you have to grow tropical plants under glass.

glass noun (CONTAINER)

A1 [C] a small container for drinks made of glass or similar material, with a flat base and usually with no handle: a beer/wine glass She poured some milk into a glass. a glass of sth A1 a type or amount of drink contained in a glass: Would you like a glass of water? Two glasses of lemonade, please.

glass noun (FOR IMPROVING SIGHT)

glasses [plural] A1 two small pieces of special glass or plastic in a frame worn in front of the eyes to improve sight: a pair of glasses reading glasses

glass noun (DEVICE)

the glass [S] old-fashioned a barometer: The glass has been falling/rising (= showing a change to bad/good weather) all day.
(Definition of glass from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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