glass

¹

[ glas ]

noun

1. a hard, brittle, noncrystalline, more or less transparent substance produced by fusion, usually consisting of mutually dissolved silica and silicates that also contain soda and lime, as in the ordinary variety used for windows and bottles.
2. any artificial or natural noncrystalline and transparent hard substance, such as fused borax, obsidian, or the like.
3. something made of a noncrystalline and transparent hard substance, such as a windowpane.
4. a tumbler or other comparatively tall, handleless drinking container.
5. the quantity contained within a tumbler or other tall, handleless drinking container; a glassful:

   She poured two glasses of wine for herself and her guest.

   Drink a glass of orange juice and you'll feel better.

6. a tumbler or other tall, handleless drinking container with its contents:

   Hand me that glass of milk.

7. glas·ses, Also called eye·glas·ses [ahy, -gla-siz]. a device to compensate for impaired vision or to protect the eyes from light, dust, and the like, consisting usually of two glass or plastic lenses set in a frame that includes a nosepiece for resting on the bridge of the nose and two sidepieces extending over or around the ears (usually used with pair of ). Compare goggle ( def 1a ), pince-nez, spectacle ( def 3 ).
8. a mirror.
9. things made of glass, collectively; glassware:

   They used to collect old glass.

10. a lens, especially one used as a magnifying glass.
11. a spyglass.

adjective

1. made of glass:

   a glass tray.

2. furnished or fitted with panes of glass; glazed.

verb (used with object)

1. to fit with panes of glass.
2. cover with or encase in glass.
3. to coat or cover with fiberglass:

   to glass the hull of a boat.

4. to scan with a spyglass or other optical instrument.
5. to reflect:

   Trees glassed themselves in the lake.

Glass

²

[ glas, glahs ]

noun

1. Carter, 1858–1946, U.S. statesman.
2. Philip, born 1937, U.S. composer.

glass

¹

/ ɡlɑːs /

noun

1. 1. a hard brittle transparent or translucent noncrystalline solid, consisting of metal silicates or similar compounds. It is made from a fused mixture of oxides, such as lime, silicon dioxide, etc, and is used for making windows, mirrors, bottles, etc
   2. ( as modifier ) vitreousvitric

      a glass bottle

2. any compound that has solidified from a molten state into a noncrystalline form
3. something made of glass, esp a drinking vessel, a barometer, or a mirror
4. Also calledglassful the amount contained in a drinking glass
5. glassware collectively
6. See volcanic glass
7. See fibreglass

verb

1. to cover with, enclose in, or fit with glass
2. informal.
   to hit (someone) in the face with a glass or a bottle

Glass

²

/ ɡlɑːs /

noun

1. GlassPhilip1937MUSMUSIC: composer Philip. born 1937, US composer noted for his minimalist style: his works include Music in Fifths (1970), Akhnaten (1984), The Voyage (1992), and Monsters of Grace (1998); his film music includes scores for Kundun (1998), The Truman Show (1999), and The Hours (2002)

glass

/ glăs /

1. A usually transparent or translucent material that has no crystalline structure yet behaves like a solid. Common glass is generally composed of a silicate (such as silicon oxide, or quartz) combined with an alkali and sometimes other substances. The glass used in windows and windshields, called soda glass, is made by melting a silicate with sodium carbonate (soda) and calcium oxide (lime). Other types of glass are made by adding other chemical compounds. Adding boron oxide causes some silicon atoms to be replaced by boron atoms, resulting in a tougher glass that remains solid at high temperatures, used for cooking utensils and scientific apparatuses. Glass used for decorative purposes often has iron in it to alter its optical properties.

Derived Forms

• ˈglassˌlike, adjective
• ˈglassless, adjective

Other Words From

• glass·less adjective
• glass·like adjective
• non·glass adjective
• un·glassed adjective

Word History and Origins

Origin of glass¹

First recorded before 900; Middle English noun glas, Old English glæs; cognate with Dutch, German Glas

Word History and Origins

Origin of glass¹

Old English glæs; related to Old Norse gler, Old High German glas, Middle High German glast brightness; see glare ¹

A Closer Look

Common sand and glass are both made primarily of silicon and oxygen, yet sand is opaque and glass is transparent. Glass owes its transparency partly to the fact that it is not a typical solid. On the molecular level, solids usually have a highly regular, three-dimensional crystalline structure; the regularities distributed throughout the solid act as mirrors that scatter incoming light. Glass, however, consists of molecules which, though relatively motionless like a typical solid, are not arranged in regular patterns and thus exhibit little scattering; light passes directly through. At a specific temperature, called the melting point, the intermolecular forces holding together the components of a typical solid can no longer maintain the regular structure, which then breaks down, and the material undergoes a phase transition from solid to liquid. The phase transition in glass, however, depends on how quickly the glass is heated (or how quickly it cools), due to its irregular solid structure.

Idioms and Phrases

• people who live in glass houses

Example Sentences

She told MPs that this included a “foetal skeleton posed under a glass dome, a human thigh bone turned into a cane, a human jawbone necklace and the varnished skull of a six-year-old”.

From BBC

After the plants were removed, the glass was left with a complex 3D microfluidic network of micrometer-sized hollow holes where the roots once were.

From Science Daily

“The government believes that just by proving to you that Hobson has a tattoo that somehow this is Cinderella, where only one person in the land can fit the size-six glass slipper.”

From Los Angeles Times

"I've heard 'I was manipulated', I've heard 'I drank a glass of water, I was drugged'. But at what point did they not realise?"

From BBC

If you get one of these containers, do not use it to reheat the food or your leftovers — transfer the food to glass or ceramic containers.

From Los Angeles Times

Related Words

• bottle
• cup
• jar
• jug