For example:
* Is "glass" used as a noun? If so, what kind of glass are you referring to?
* A material: "The glass was shattered."
* A container: "She drank from a glass of water."
* A windowpane: "The glass was dirty."
* Is "glass" used as a verb? If so, what does it mean in that context?
* To look at someone or something intensely: "He glassed her with a look of hatred."
* To fill something with glass: "The artist glassed the vase with colorful pieces."
* Is "glass" part of a larger phrase? For example, "a glass of water," "glass ceiling," "glassblowing," etc.
Once you provide more context, I can give you a more accurate and relevant description of the phrase "glass."