Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. 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.
  • n. Something usually made of glass, especially:
  • n. A drinking vessel.
  • n. A mirror.
  • n. A barometer.
  • n. A window or windowpane.
  • n. A pair of lenses mounted in a light frame, used to correct faulty vision or protect the eyes.
  • n. A binocular or field glass. Often used in the plural.
  • n. A device, such as a monocle or spyglass, containing a lens or lenses and used as an aid to vision.
  • n. The quantity contained by a drinking vessel; a glassful.
  • n. Objects made of glass; glassware.
  • adj. Made or consisting of glass.
  • adj. Fitted with panes of glass; glazed.
  • transitive v. To enclose or encase with glass.
  • transitive v. To put into a glass container.
  • transitive v. To provide with glass or glass parts.
  • transitive v. To make glassy; glaze.
  • transitive v. To see reflected, as in a mirror.
  • transitive v. To reflect.
  • transitive v. To scan (a tract of land or forest, for example) with an optical instrument.
  • intransitive v. To become glassy.
  • intransitive v. To use an optical instrument, as in looking for game.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A solid, transparent substance made by melting sand with a mixture of soda, potash and lime.
  • n. A vessel from which one drinks, especially one made of glass, plastic, or similar translucent or semi-translucent material.
  • n. The quantity of liquid contained in such a vessel.
  • n. Amorphous (non-crystalline) substance.
  • n. Glassware.
  • n. A mirror.
  • n. A magnifying glass or telescope.
  • n. The backboard.
  • n. The clear, protective screen surrounding a hockey rink.
  • n. A barometer.
  • v. To furnish with glass; to glaze.
  • v. To enclose with glass.
  • v. To strike (someone), particularly in the face, with a drinking glass with the intent of causing injury.
  • v. To bombard an area with such intensity (nuclear bomb, fusion bomb, etc) as to melt the landscape into glass.
  • v. To view through an optical instrument such as binoculars.
  • v. To smooth or polish (leather, etc.), by rubbing it with a glass burnisher.
  • v. To reflect; to mirror.

from the GNU version of the Collaborative International Dictionary of English

  • n. 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.
  • n. Any substance having a peculiar glassy appearance, and a conchoidal fracture, and usually produced by fusion.
  • n. Anything made of glass.
  • n. A looking-glass; a mirror.
  • n. A vessel filled with running sand for measuring time; an hourglass; and hence, the time in which such a vessel is exhausted of its sand.
  • n. A drinking vessel; a tumbler; a goblet; hence, the contents of such a vessel; especially; spirituous liquors; as, he took a glass at dinner.
  • n. An optical glass; a lens; a spyglass; -- in the plural, spectacles; as, a pair of glasses; he wears glasses.
  • n. A weatherglass; a barometer.
  • transitive v. To reflect, as in a mirror; to mirror; -- used reflexively.
  • transitive v. To case in glass.
  • transitive v. To cover or furnish with glass; to glaze.
  • transitive v. To smooth or polish anything, as leater, by rubbing it with a glass burnisher.

from The Century Dictionary and Cyclopedia

  • n. A substance resulting from the fusion of a combination of silica (rarely boracic acid) with various bases. See vitreous.
  • n. A plate, screen, vessel, instrument, etc., made of glass.
  • n. A plate or pane of glass inserted in the frame of a window, picture, clock, hotbed, etc., to admit the light or permit a view, while excluding wind, rain, dust, or other interference.
  • n. A looking-glass; a mirror. It was formerly fashionable for ladies to carry a looking-glass hanging from the girdle.
  • n. A glass vessel filled with running sand for measuring time, called specifically an hour-glass; hence, the time in which a glass is exhausted of its sand; specifically (nautical), the time in which a half-hour glass is emptied of its sand.
  • n. A vessel made of glass: as, a jelly-glass; a finger-glass. Especially—
  • n. A drinking-vessel made of glass; hence, the quantity which such a vessel holds, and figuratively what one drinks, especially strong drink: as, fond of his glass.
  • n. An observing-instrument made of glass, or of which the main or most important part is of glass. A lens; a telescope; a field-glass. A barometer. A thermometer. An eye-glass: usually in the plural eye-glasses or spectacles.
  • n. Glass having a lime base instead of a lead base, in this sense including nearly all the ornamental glassware, vessels, etc., of the best periods and styles, Venetian Spanish, and others.
  • n. A kind of glass which is quite colorless, hard, difficultly fusible, and less readily acted upon by chemicals than any other kind of glass. Mirrors are often made of it, and it is largely used for the manufacture of chemical apparatus. It is made from ground quartz, purified potash, and lime.
  • n. A musical instrument consisting either of glass tubes or glass bowls, graduated in size, which can be played by the friction of the moistened finger. Also called glass harmonica.
  • n. Glass made ornamental by the application of a white metallic film to the unexposed side, giving it a silvery luster.
  • n. Less properly, same as enameled glass. See glass-painting.
  • n. Glass that has been heated and then suddenly cooled, under the process of F. Siemens. When the articles to be made are such as are generally molded, the molten glass is run into suitable molds and squeezed while it is highly heated, the mold cooling it sufficiently without the liquid bath.
  • [Attrib. use of the noun. The older adj. is glazen, q. v.] Made of glass; vitreous: as, a glass bottle.—
  • To case in glass; cover with or as if with glass; protect by a covering of glass.
  • To make glassy; give a glazed surface to; glaze or polish.
  • To reflect, as a mirror or other reflecting surface; show or observe a reflection of.
  • n. In petrography, glass is the natural product of the rapid cooling of igneous magmas, and in large masses is known as obsidian, pitchstone, and pumice. It may be colorless or of various colors, as white, yellow, orange, red, green, and black. It forms the ground-mass of many volcanic rocks, being sometimes recognizable by the unaided eye, but often only microscopically. Glass base to the name given to it when it forms the matrix for microscopic crystals in the ground-mass of a rock.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. furnish with glass
  • v. enclose with glass
  • n. a container for holding liquids while drinking
  • n. a small refracting telescope
  • n. a mirror; usually a ladies' dressing mirror
  • n. glassware collectively
  • v. put in a glass container
  • v. become glassy or take on a glass-like appearance
  • n. a brittle transparent solid with irregular atomic structure
  • v. scan (game in the forest) with binoculars
  • n. the quantity a glass will hold
  • n. an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant

Etymologies

Middle English glas, from Old English glæs; see ghel-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Old English glæs; cognate with Old Saxon glas ("amber") and Old High German glas, the latter attested as a gloss for Latin electrum ("amber"). All the former developed from Proto-Germanic *glasan; possibly ultimately from the *glasan root *glōanan (“to shine”); compare glow. (Wiktionary)

Examples

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  • A library is a looking-glass in which the owner's mind is reflected."-Dr. Holmes

    May 1, 2009