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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Their two children, ages 4 and 1, were found physically unharmed in the residence when police conducted the welfare check.—
Samira Asma-Sadeque,
PEOPLE,
12 Jan. 2026
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Their two young children, ages 1 and 4, were also at the home at the time of the slayings, but were not physically harmed.—
Muri Assuncao,
Mercury News,
12 Jan. 2026
Noun
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And while Mamdani longs for a future of free Big Apple trips, riders will instead be getting slapped with price hikes in a matter of days.—
Alex Nitzberg,
FOXNews.com,
1 Jan. 2026
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The Frostys spread joy all year, providing happy sing-a-longs to seniors living in memory care communities.—
Karen Billing,
San Diego Union-Tribune,
24 Dec. 2025
Noun
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The fourth largest of Jupiter’s 95 moons, Europa is an icy celestial body that scientists have long suspected could harbor the conditions necessary to support life beneath its surface.—
Eric Lagatta,
USA Today,
8 Jan. 2026
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Besides its prominent cloud belts, Jupiter's greatest telescopic treasure are its four Galilean moons that run a merry race with each other around the planet, changing their respective positions from hour to hour and night to night.—
Joe Rao,
Space.com,
7 Jan. 2026
Cite this Entry
“Blue moons.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moons. Accessed 17 Jan. 2026.
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