euclidean

adjective

eu·clid·e·an yü-ˈkli-dē-ən

variants or less commonly euclidian

often capitalized

: of, relating to, or based on the geometry of Euclid or a geometry with similar axioms

Word History

First Known Use

1660, in the meaning defined above

Time Traveler

The first known use of euclidean was in 1660

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Cite this Entry

Style

“Euclidean.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/euclidean. Accessed 8 Sep. 2025.

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Kids Definition

Euclidean

adjective

Eu·clid·e·an

yu̇-ˈklid-ē-ən

: of or relating to the geometry of Euclid

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