supermoon

noun

su·​per·​moon ˈsü-pər-ˌmün 

plural supermoons

: a full moon occurring when the moon is at or near the closest point in its orbit

A supermoon … occurs when the moon is full within 24 hours of being at its closest point to the Earth in its orbit.

—Kaleigh Rogers

Visible supermoons appear 14% bigger and 30% brighter than full moons that occur at the farthest point in the moon's orbit.

—Karen Hao

As the first and only supermoon of 2017 rose high into the sky this Sunday (Dec. 3), astrophotographers seized the opportunity to shoot the moon in all its bigger-than-usual glory.

—Hanneke Weitering

Examples of supermoon in a Sentence

Recent Examples on the Web

Will skies be clear in Louisville during the supermoon? —Marina Johnson, Louisville Courier Journal, 24 Oct. 2025

John Tufts Shortly after Halloween, stargazers in Indiana will be treated to perhaps the largest and brightest supermoon of 2025. —John Tufts, IndyStar, 23 Oct. 2025

Yes, the beaver moon will be the second of three consecutive full supermoons, and the closest supermoon to Earth in 2025. —Jenna Prestininzi, Freep.com, 20 Oct. 2025

This October, a full supermoon has graced our skies, washing out the Draconid meteor shower. —Big Think, 13 Oct. 2025

Word History

First Known Use

1979, in the meaning defined above

Rhymes for supermoon

• afternoon
• forenoon
• honeymoon
• laocoon
• opportune
• pantaloon
• picayune
• tablespoon
• attune
• baboon
• balloon
• bassoon