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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Most apps have questions requesting users’ ages, and some use specialized identification technology, but proponents say children are getting around these barriers.—
Kate Wolffe,
Sacbee.com,
17 Mar. 2026
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Illinois also broke with federal vaccine recommendations on other occasions last year, deciding to continue to recommend hepatitis B vaccines for nearly all newborns and to continue to recommend COVID-19 vaccines for all children ages 6 to 23 months.—
Lisa Schencker,
Chicago Tribune,
17 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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Zac longs for more family time.—
Kathleen Walsh,
Vulture,
13 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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This category has seen a lot of twists and turns over the many moons of awards season.—
David Sims,
The Atlantic,
13 Mar. 2026
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However, by interacting with Jupiter's magnetic field, its four largest moons — the Galilean moons Io, Europa, Ganymede and Callisto — can leave an imprint on the aurora.—
Keith Cooper,
Space.com,
10 Mar. 2026
Cite this Entry
“Blue moons.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moons. Accessed 22 Mar. 2026.
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