often attributive
1
: any of various amorphous materials formed from a melt by cooling to rigidity without crystallization: such as
a
: a usually transparent or translucent material consisting typically of a mixture of silicates
b
: a material (such as obsidian) produced by fast cooling of magma
2
b(1)
: an optical instrument or device that has one or more lenses and is designed to aid in the viewing of objects not readily seen
(2)
: field glasses, binoculars
—usually used in plural
c
glasses plural
: a device used to correct defects of vision or to protect the eyes that consists typically of a pair of glass or plastic lenses and the frame by which they are held in place
called also eyeglasses, spectacles
3
: the quantity held by a glass container
4
5
: crystal meth
specifically
: a pure form of crystal meth
glassed; glassing; glasses
1
a
: to provide with glass : glaze sense 1
b
: to enclose, case, or wall with glass
the sunroom was glassed in
2
: to make glassy
3
a
: reflect
b
: to see mirrored
4
: to look at through an optical instrument (such as a pair of binoculars)
Synonyms
Examples of glass in a Sentence
Noun
The waiter filled our glasses with water.
She drank two glasses of water.
She was wearing dark glasses with thick black frames.
Recent Examples on the Web
Allen Farmelo, Robb Report, 25 Apr. 2024
Credit union employees told police a tall woman with curly gray hair and glasses, dressed in a gray shirt, sweatpants and a COVID-19 mask, had entered the bank.
—The Enquirer, 25 Apr. 2024
See all Example Sentences for glass 
Noun
The amazing treatment on the dial looks like cracked glass.
—Allen Farmelo, Robb Report, 25 Apr. 2024
Credit union employees told police a tall woman with curly gray hair and glasses, dressed in a gray shirt, sweatpants and a COVID-19 mask, had entered the bank.
—The Enquirer, 25 Apr. 2024
See all Example Sentences for glass
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'glass.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near glass
Cite this Entry
“Glass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glass. Accessed 4 May. 2024.
Copy CitationKids Definition
glass
1 of 2 noun1
: a hard brittle usually transparent substance commonly formed by melting a mixture of sand and chemicals and cooling to hardness
2
a
: something (as a water tumbler, lens, mirror, barometer, or telescope) that is made of glass or has a glass lens
b
plural
: a pair of glass or plastic lenses held in a frame and used to help one see clearly or to protect the eyes
3
: the quantity held by a glass
glass
2 of 2 verb
: to fit or protect with glass
Medical Definition
glass
nounoften attributive
1
a
: an amorphous inorganic usually transparent or translucent substance consisting of a mixture of silicates or sometimes borates or phosphates formed by fusion of silica or of oxides of boron or phosphorus with a flux and a stabilizer into a mass that cools to a rigid condition without crystallization
b
: a substance resembling glass especially in hardness and transparency
organic glasses made from plastics
2
a
: an optical instrument or device that has one or more lenses and is designed to aid in the viewing of objects not readily seen
b
glasses plural
: a device used to correct defects of vision or to protect the eyes that consists typically of a pair of glass or plastic lenses and the frame by which they are held in place
called also eyeglasses
Biographical Definition
Glass
2 of 2biographical name (2)
Philip 1937– American composer
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