lunation

noun

lu·​na·​tion lü-ˈnā-shən How to pronounce lunation (audio)
: the period of time averaging 29 days, 12 hours, 44 minutes, and 2.8 seconds elapsing between two successive new moons

Examples of lunation 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.
Be sure to look to this lunation to set intentions around love and romance. Valerie Mesa, PEOPLE, 6 Oct. 2025 This lunation is a wake-up call to check in on what’s actually supporting you versus what’s draining you. Dossé-Via Trenou, Refinery29, 5 Oct. 2025 This lunation highlights daily routines and habits, prompting the release of what no longer serves you—including thoughts and beliefs! Meghan Rose, Glamour, 1 Oct. 2025 See All Example Sentences for lunation

Word History

Etymology

Middle English lunacioun, borrowed from Anglo-French & Latin; Anglo-French lunaison, lunaciun, borrowed from Medieval Latin lūnātiōn-, lūnātiō, from Latin lūna "moon" + -ātiōn-, -ātiō -ation — more at lunar

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of lunation was in the 14th century

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Cite this Entry

“Lunation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lunation. Accessed 17 Oct. 2025.

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