as in months
a long or seemingly long period of time
once in a blue moon we'll get dressed up and eat in a fancy restaurant
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Recent Examples of blue moons
Super blue moons can also occur, but don’t be fooled by the name.
—
Callum Sutherland, Time, 6 Oct. 2025
Black moons are referenced like blue moons, which are defined as the third full moon in an astronomical season containing four full moons.
—Janet Loehrke, USA Today, 21 Aug. 2025
Callum Sutherland, Time, 6 Oct. 2025
Black moons are referenced like blue moons, which are defined as the third full moon in an astronomical season containing four full moons.
—Janet Loehrke, USA Today, 21 Aug. 2025
Recent Examples of Synonyms for blue moons
Noun
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Founded by marine life artist Wyland, the foundation empowers people of all ages to become stewards of our planet through hands-on educational programs, public art, and national initiatives like the Mayor's Challenge for Water Conservation.—
CBS LA Staff,
CBS News,
31 Mar. 2026
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Of these, 9,195 were ages 55 and older, per the data found on SANDAG’s website.—
Sierra Knoch,
San Diego Union-Tribune,
31 Mar. 2026
Noun
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Those tush-pushes can’t beat you if The Winter Soldier’s facing third-and-forevers.—
Joe Nguyen,
Denver Post,
17 Jan. 2026
Noun
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Donica, across from her, is on sturdier ground, fearsome to the point of awe-inspiring in the sustained fury of his fermatas, though his considerable force as a performer longs to be shaped more cleanly.—
Jackson McHenry,
Vulture,
19 Mar. 2026
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Selling programs have been relentless in the S & P 500, as many of these algorithmic systems look to push ranges (both lower and higher), flushing weak longs out of the market.—
Jeff Kilburg,
CNBC,
6 Mar. 2026
Noun
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Scientists are still investigating what ultimately happened to Chrysalis' surviving core, and whether debris from the event may have left traces elsewhere in Saturn's system — such as unusual impact features on icy moons that could perhaps be detected by future spacecraft.—
Sharmila Kuthunur,
Space.com,
27 Mar. 2026
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Similar to Hubble's image, several of Saturn's moons are visible, including Janus near the rings to the left of the planet, and Dione below.—
Eric Lagatta,
USA Today,
26 Mar. 2026
Cite this Entry
“Blue moons.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moons. Accessed 3 Apr. 2026.
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