Glass is the hard, transparent material that's used to make windows. While glass can be strong and sturdy, it's also brittle and can be broken easily by an errant baseball.

Glass has all kinds of practical uses, from car windshields to greenhouse windows to jam jars to drinking glasses. When someone offers you a glass of water, they're referring to the vessel itself as a glass and also to amount it can hold — the glassful of liquid. The Old English source of glass is glæs, ultimately from a Proto-Indo-European root that means "to shine."

Primary Meanings of glass

a brittle transparent solid with irregular atomic structure
furnish with glass
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
Full Definitions of glass

n a brittle transparent solid with irregular atomic structure

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natural glass
magma of any composition that cooled very rapidly
milk glass, opal glass
a milky white translucent or opaque glass
optical glass
clear homogeneous glass of known refractive index; used to make lenses
crown glass
a glass blown into a globe which is later flattened and spun to form a disk
soft glass
glass having a relatively low softening point
ground glass
glass that diffuses light due to a rough surface produced by abrasion or etching
ground glass
particulate glass made by grinding and used as an abrasive
lead glass
glass containing lead oxide; has a high refractive index
laminated glass, safety glass, shatterproof glass
glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering
sodium silicate, soluble glass, water glass
a viscous glass consisting of sodium silicate in solution; used as a cement or as a protective coating and to preserve eggs
stained glass
glass that has been colored in some way; used for church windows
wire glass
a glass that contains a layer of wire netting in it
a borosilicate glass with a low coefficient of expansion; used for heat-resistant glassware in cooking and chemistry
crystal, lechatelierite, quartz, quartz glass, vitreous silica
colorless glass made of almost pure silica
crown glass, optical crown, optical crown glass
optical glass of low dispersion and low refractive index
flint glass, optical flint
optical glass of high dispersion and high refractive index
thought to derive from meteorites
a hard, brilliant lead glass that is used in making artificial jewelry
Tiffany glass
a kind of opalescent colored glass that was used in the early 1900s for stained-glass windows and lamps
Type of:
matter that is solid at room temperature and pressure

n glassware collectively

“She collected old glass
Type of:
glassware, glasswork
an article of tableware made of glass

n a container for holding liquids while drinking

drinking glass
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beer glass
a relatively large glass for serving beer
a glass filled to the brim (especially as a toast)
a drinking glass with a base and stem
highball glass
a tall glass for serving highballs
liqueur glass
a small glass for serving a small amount of liqueur (typically after dinner)
parfait glass
a tall slender glass with a short stem in which parfait is served
a large drinking glass (ovoid bowl on a stem) for drinking toasts
a large beer glass
a glass for beer
jigger, pony, shot glass
a small glass adequate to hold a single swallow of whiskey
brandy glass, brandy snifter, snifter
a globular glass with a small top; used for serving brandy
a glass with a flat bottom but no handle or stem; originally had a round bottom
water glass
a glass for drinking water
a glass that has a stem and in which wine is served
champagne flute, flute, flute glass
a tall narrow wineglass
Type of:
any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another)

n the quantity a glass will hold

Type of:
the quantity that a container will hold

n a mirror; usually a ladies' dressing mirror

looking glass
Type of:
polished surface that forms images by reflecting light

n a small refracting telescope

field glass, spyglass
Type of:
refracting telescope
optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece

v furnish with glass

glass the windows”
provide with two sheets of glass
Type of:
furnish, provide, render, supply
give something useful or necessary to

v enclose with glass

glass in a porch”
glass in
Type of:
close in, enclose, inclose, shut in
surround completely

v put in a glass container

Type of:
enclose, inclose, insert, introduce, put in, stick in

v scan (game in the forest) with binoculars

Type of:
examine minutely or intensely

v become glassy or take on a glass-like appearance

glass over, glaze, glaze over
Type of:
undergo a change; become different in essence; losing one's or its original nature

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

Type of:
controlled substance
a drug or chemical substance whose possession and use are controlled by law

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