Meaning of “glass” - Learner’s Dictionary

glass

noun uk us /ɡlɑːs/
SUBSTANCE [ U ]

A1 a hard, transparent substance that objects such as windows and bottles are made of:

broken glass
glass jars
DRINKING CONTAINER [ C ]

A1 a container made of glass that is used for drinking:

I'll get you a clean glass.
Would you like a glass of water?
→ See also magnifying glass , stained glass

(Definition of “glass” from the Cambridge Learner’s Dictionary © Cambridge University Press)