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.
Embrace the unpredictability surrounding this lunation, and expect the unexpected with themes surrounding your community affairs. Valerie Mesa, People.com, 5 Aug. 2025 This lunation illuminates your public image and legacy zone. Dossé-Via Trenou, Refinery29, 3 Aug. 2025 Let this lunation guide you toward experiences that ignite your spirit! Meghan Rose, Glamour, 1 Aug. 2025 On July 24th, the day of the lunation, Saturn retrograded in Aries, Neptune retrograded in Aries, Uranus in Gemini, and Pluto retrograde in Aquarius, are in aspect with the New Moon. Lisa Stardust, Refinery29, 21 July 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

Browse Nearby Words

Cite this Entry

“Lunation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lunation. Accessed 21 Aug. 2025.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!