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Word of the Day Tuesday, June 9, 2026

lunation

/luːˈneɪʃən/ noun · British & US
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What does lunation mean?

noun

A month of the moon; a period of 29 1/2 days, or the time required for the moon to complete one orbit around the earth. In astronomy, the time required for the moon to complete one orbit around the earth.

Example

"The lunation cycle is approximately 29.5 days."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for lunation

Rhymes with lunation

Etymologically related