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
Kaleigh RogersVisible supermoons appear 14% bigger and 30% brighter than full moons that occur at the farthest point in the moon's orbit.—Karen Hao
Karen HaoAs 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
Hanneke WeiteringExamples of supermoon in a Sentence
Recent Examples on the Web
The moon orbits Earth in a slight ellipse, so a full moon can sometimes be slightly closer than usual — a supermoon.
—Jamie Carter, Forbes.com, 11 July 2025
Space enthusiasts may notice the full moon appearing up to 14% smaller and 30 percent dimmer than a supermoon, according to the space agency.
—Anthony Robledo, USA Today, 12 Apr. 2025
The opposite of a supermoon, a micromoon appears as a slightly smaller and dimmer full moon in the night sky, the Almanac said.
—Hannah Poukish, Sacbee.com, 3 Apr. 2025
The Moon In 2025 June's full moon is the sixth of 12 full moons in 2025, three of which will be supermoons (in October, November and December).
—Jamie Carter, Forbes.com, 11 June 2025
See All Example Sentences for supermoon
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Jamie Carter, Forbes.com, 11 July 2025
Space enthusiasts may notice the full moon appearing up to 14% smaller and 30 percent dimmer than a supermoon, according to the space agency.
—Anthony Robledo, USA Today, 12 Apr. 2025
The opposite of a supermoon, a micromoon appears as a slightly smaller and dimmer full moon in the night sky, the Almanac said.
—Hannah Poukish, Sacbee.com, 3 Apr. 2025
The Moon In 2025 June's full moon is the sixth of 12 full moons in 2025, three of which will be supermoons (in October, November and December).
—Jamie Carter, Forbes.com, 11 June 2025
See All Example Sentences for supermoon
Cite this Entry
“Supermoon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/supermoon. Accessed 29 Jul. 2025.
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