1
: a polyhedron with two polygonal faces lying in parallel planes and with the other faces parallelograms
2
a
: a transparent body that is bounded in part by two nonparallel plane faces and is used to refract or disperse a beam of light
b
: a prism-shaped decorative glass luster
3
: a crystal form whose faces are parallel to one axis
especially : one whose faces are parallel to the vertical axis
4
: a medium that distorts, slants, or colors whatever is viewed through it

Examples of prism in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Churchill’s politics emerge with the same craftiness as her mysticism, like a beam refracted around the corner of a dream-logic prism. Sara Holdren, Vulture, 17 Apr. 2025 Bayern’s strategy over the years needs to be viewed through the specific prism of German football. Sebastian Stafford-Bloor, New York Times, 8 Apr. 2025 And that is the power of having a team with a multiplicity of different prisms. Matthew Phillips, Forbes.com, 3 Apr. 2025 And rendering specialists need it to accurately simulate real-world optical effects like dispersion (rainbows from prisms, for example) and fluorescence. ArsTechnica, 28 Mar. 2025 See All Example Sentences for prism

Word History

Etymology

Late Latin prismat-, prisma, from Greek, literally, anything sawn, from priein to saw

First Known Use

1570, in the meaning defined at sense 1

Time Traveler
The first known use of prism was in 1570

Browse Nearby Words

Cite this Entry

“Prism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prism. Accessed 22 Apr. 2025.

Kids Definition

prism

noun
1
: a polyhedron with two opposite ends that are parallel polygons and faces that are each parallelograms
2
: a transparent object that usually has three sides and bends light so that it breaks up into rainbow colors

Medical Definition

prism

noun
1
: a polyhedron with two polygonal faces lying in parallel planes and with the other faces parallelograms
2
: a transparent body that is bounded in part by two nonparallel plane faces and is used to refract or disperse a beam of light
3
: a crystal form whose faces are parallel to one axis
especially : one whose faces are parallel to the vertical axis

More from Merriam-Webster on prism

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