co·​pla·​nar (ˌ)kō-ˈplā-nər How to pronounce coplanar (audio)
: lying or acting in the same plane
coplanarity noun

Examples of coplanar in a Sentence

Recent Examples on the Web 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

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'coplanar.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1853, in the meaning defined above

Time Traveler
The first known use of coplanar was in 1853

Dictionary Entries Near coplanar

Cite this Entry

“Coplanar.” Dictionary, Merriam-Webster, Accessed 4 Mar. 2024.

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