glass Definition in the Cambridge English Dictionary
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Definition of “glass” - English Dictionary

Definition of "glass" - American English Dictionary

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glassnoun [C/U]

 us   /ɡlæs/
a hard, ​transparentmaterial that is used to make ​windows, ​bottles, and other ​objects A glass is a ​smallcontainer of glass, usually round and without a ​handle, for ​holding a ​liquid that you can ​drink, or the ​liquidheld 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)

Definition of "glass" - British English Dictionary

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glassnoun

uk   /ɡlɑːs/  us   /ɡlæs/

glass noun (SUBSTANCE)

A1 [U] a hard, ​transparentmaterial, used to make ​windows, ​bottles, and other ​objects: coloured/​broken glass a glass ​jar/​dish/​ornament It's a ​hugewindow made from a ​single pane of glass. [U] objects made from glass when ​thought of as a ​group: The ​museum has a ​finecollection of ​valuable glass.under glass in a glasshouse : In ​coolclimates you have to ​growtropicalplants under glass.
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glass noun (CONTAINER)

A1 [C] a ​smallcontainer for ​drinks made of glass or ​similarmaterial, with a ​flatbase 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 ​drinkcontained in a glass: Would you like a glass of ​water? Two glasses of ​lemonade, ​please.
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glass noun (FOR IMPROVING SIGHT)

glasses [plural]
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A1 two ​smallpieces of ​special glass or ​plastic in a ​frameworn in ​front of the ​eyes to ​improvesight: 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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