Meaning of “glass” in the English Dictionary

"glass" in British English

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uk /ɡlɑːs/ us /ɡlæs/

glass noun (SUBSTANCE)

A1 [ U ] a hard, transparent material, used to make windows, bottles, and other objects:

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.

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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.

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glasses [ plural ]

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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 Learner’s Dictionary & Thesaurus © Cambridge University Press)

"glass" in American English

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glassnoun [ C/U ]

us /ɡlæs/

a hard, transparent material that is used to make windows, bottles, and other objects

A glass is a small container of glass, usually round and without a handle, for holding a liquid that you can drink, or the liquid held by such a container:

[ C ] She poured some milk into a glass.
[ C ] May I have a glass of water?

glassadjective [ not gradable ]

us /ɡlæs/

made of glass:

a glass jar/bottle

(Definition of “glass” from the Cambridge Academic Content Dictionary © Cambridge University Press)