coplanar

adjective

co·​pla·​nar (ˌ)kō-ˈplā-nər How to pronounce coplanar (audio)
-ˌnär
: lying or acting in the same plane
coplanarity
ˌkō-plā-ˈner-ə-tē How to pronounce coplanar (audio)
-ˈna-rə-
noun

Examples of coplanar 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.
The middle layer carries a coplanar waveguide resonator, a special structure that produces the high-frequency (GHz) field needed to trap electrons. — Rupendra Brahambhatt, Interesting Engineering, 11 Apr. 2026 To get around these material shortcomings, most superconducting circuits use what are called coplanar capacitors. — IEEE Spectrum, 7 Feb. 2022 In their study, Müller and his team argue that if coplanar alignments of dwarf galaxies are widespread, this would pose a worthy challenge to the LCDM model—which predicts a random distribution of dwarfs. — Shannon Stirone, Scientific American, 1 Feb. 2018 Hundreds of coplanar triple systems have been found, their numbers enhanced in particular by the discoveries made first by NASA's Kepler Space Telescope and now TESS. — Keith Cooper, Space.com, 3 June 2026

Word History

First Known Use

1853, in the meaning defined above

Time Traveler
The first known use of coplanar was in 1853

Rhymes for coplanar

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Browse Nearby Words

copium
coplanar
Copland
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Cite this Entry

“Coplanar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coplanar. Accessed 8 Jul. 2026.

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