glass

1. An amorphous solid, often transparent substance, usually made by melting silica sand with various additives (for most purposes, a mixture of soda, potash and lime is added). (uncountable) · This tabletop is made of glass.· A popular myth is that window glass is actually an extremely viscous liquid.
2. Any amorphous solid (one without a regular crystal lattice). (countable, uncountable)
3. A vessel from which one drinks, especially one made of glass, plastic, or similar translucent or semi-translucent material. (countable) · Would you like a glass of wine?· Fill my glass with milk, please.
4. The quantity of liquid contained in such a vessel. (countable, uncountable) · There is half a glass of milk in each pound of chocolate we produce.
5. Glassware. (uncountable) · We collected art glass.
6. A mirror. (countable, uncountable) · She adjusted her lipstick in the glass.
7. A magnifying glass or loupe. (countable, uncountable)
8. A telescope. (countable, uncountable)

Plural glasses