glass

UK: /ˈɡlɑːs/ US: /glæs/ ,(glas, gläs)

WordReference Random House Learner's Dictionary of American English © 2025

glass /glæs/   n. 

1. Chemistry [uncountable] a hard, brittle, mostly transparent substance, usually produced by heating and melting sand, soda, and lime, as in the ordinary kind used for windows.
2. a tumbler or other drinking container without a handle:
   [countable] a drinking glass.
3. a glassful:
   [countable] drank two glasses of water.
4. glasses, Also called eyeglasses. [plural] two glass or plastic lenses set in a frame that includes two side pieces extending over and behind the ears, to help someone with defective vision see better or to protect the eyes from light, dust, etc.
5. [countable] a mirror.
6. things made of glass:
   [uncountable] to collect old glass.
7. [countable] any of various instruments for viewing, as a spyglass.

adj. 

8. made of glass:
   a glass bead.

v. [~ + object]

9. to cover or enclose with glass:
   The room was glassed in.

WordReference Random House Unabridged Dictionary of American English © 2025

glass  (glas, gläs), n. 

1. Chemistry 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 substance having similar properties and composition, as fused borax, obsidian, or the like.
3. something made of such a substance, as a windowpane.
4. a tumbler or other comparatively tall, handleless drinking container.
5. glasses, Also called eyeglasses. a device to compensate for defective 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 ). Cf. goggle (def. 1), pince-nez, spectacle (def. 3).
6. a mirror.
7. things made of glass, collectively;
   glassware:
   They used to collect old glass.
8. a glassful.
9. Optics a lens, esp. one used as a magnifying glass.
10. a spyglass.

adj. 

11. made of glass:
    a glass tray.
12. furnished or fitted with panes of glass;
    glazed.

v.t. 

13. to fit with panes of glass.
14. cover with or encase in glass.
15. Building to coat or cover with fiberglass:
    to glass the hull of a boat.
16. Optics to scan with a spyglass or other optical instrument.
17. to reflect:
    Trees glassed themselves in the lake.

• bef. 900; Middle English glas (noun, nominal), Old English glæs; cognate with Dutch, German Glas

glass′less, adj. 
glass′like′, adj. 

Glass  (glas, gläs), n. 

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

Collins Concise English Dictionary © HarperCollins Publishers::

glass / ɡlɑːs/ noun

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): a glass bottle
   Related adjective(s): vitreous
3. something made of glass, esp a drinking vessel, a barometer, or a mirror
4. Also called: glassful the amount contained in a drinking glass
5. glassware collectively
6. See volcanic glass
7. See fibreglass

verb (transitive)

1. to cover with, enclose in, or fit with glass

Etymology: Old English glæs; related to Old Norse gler, Old High German glas, Middle High German glast brightness; see glare¹

ˈglassless adjective

ˈglassˌlike adjective

WordReference Random House Unabridged Dictionary of American English © 2025

Glass, +n. 

1. Biographical Philip, born 1937, U.S. composer.

Collins Concise English Dictionary © HarperCollins Publishers::

Glass / ɡlɑːs/ noun

1. 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)