Arctic Circle

noun

variants also arctic circle
: the parallel of latitude that is approximately 66½ degrees north of the equator and that circumscribes the northern frigid zone

Word History

First Known Use

circa 1587, in the meaning defined above

Time Traveler
The first known use of Arctic Circle was circa 1587

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Cite this Entry

“Arctic Circle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Arctic%20Circle. Accessed 12 Nov. 2025.

Kids Definition

arctic circle

noun
often capitalized A&C
: the parallel of latitude that is approximately 66½ degrees north of the equator
Last Updated: - Definition revised
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