glass n
1. a brittle transparent solid with irregular atomic structure
2. a glass container for holding liquids while drinking [syn: drinking glass}]
3. the quantity a glass will hold [syn: glassful]
4. a small refracting telescope [syn: field glass, spyglass]
5. amphetamine used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant [syn: methamphetamine, methamphetamine hydrochloride, Methedrine, meth, deoxyephedrine, chalk, chicken feed, crank, ice, shabu, trash]
6. a mirror; usually a ladies' dressing mirror [syn: looking glass}]
7. glassware collectively; "She collected old glass" v
8. furnish with glass; "glass the windows" [syn: glaze]
9. scan (game in the forest) with binoculars
10. enclose with glass; "glass in a porch" [syn: glass in]
11. put in a glass container
12. become glassy or take on a glass-like appearance; "Her eyes glaze over when she is bored" [syn: glaze, glass over, glaze over]

Glass \Glass\, n. [OE. glas, gles, AS. gl[ae]s; akin to D., G., Dan., & Sw. glas, Icel. glas, gler, Dan. glar; cf. AS. gl[ae]r amber, L. glaesum. Cf. Glare, n., Glaze, v. t.]
1. A hard, brittle, translucent, and commonly transparent substance, white or colored, having a conchoidal fracture, and made by fusing together sand or silica with lime, potash, soda, or lead oxide. It is used for window panes and mirrors, for articles of table and culinary use, for lenses, and various articles of ornament. Note: Glass is variously colored by the metallic oxides; thus, manganese colors it violet; copper (cuprous), red, or (cupric) green; cobalt, blue; uranium, yellowish green or canary yellow; iron, green or brown; gold, purple or red; tin, opaque white; chromium,

See more meaning on Glass...

Glass is an amorphous (non-crystalline) solid material. Glasses are typically brittle, and often optically transparent.

The most familiar type of glass, used for centuries in windows and drinking vessels, is soda-lime glass, made of about 75% silica (SiO2) plus Na2O, CaO, and several minor additives. Often, the term glass is used in a restricted sense to refer to this specific use.

In science, however, the term glass is usually defined in a much wider sense, including every solid that possesses a non-crystalline (i.e. amorphous) structure and that exhibits a glass transition when heated towards the liquid state. In this wider sense, glasses can be made of quite different classes of materials: metallic alloys, ionic melts, aqueous solutions, molecular liquids, and polymers. For many applications (bottles, eyewear) polymer glasses (acrylic glass, polyethylene terephthalate) are a lighter alternative to traditional silica glasses.

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