Definition of "glass" []

• Any of a large class of materials with highly variable mechanical and optical properties that solidify from the molten state without crystallization, are typically made by silicates fusing with boric oxide, aluminum oxide, or phosphorus pentoxide, are generally hard, brittle, and transparent or translucent, and are considered to be supercooled liquids rather than true solids. (noun)
• Something usually made of glass, especially: (noun)
• A drinking vessel. (noun)
• A mirror. (noun)
• A barometer. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "On my departure from the Tuilleries my friend conducted me to a famous glass manufactory, where I saw several mirrors of very large dimensions, and also a _staircase of glass_, which had a splendid effect, and was the first thing of the kind I had ever seen."
• "Cooked in the shell (medium or soft-boiled) eggs should be served in an egg cup or egg glass, on a plate, and _under cup or glass_."
• "Worgorn (Wroxeter); that of Emrys (Ambrosius) at Caer Caradawg; _bangor wydrin_ (glass) in the _glass isle_, Afallach; _bangor Illtud_, or"