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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In 2024, when the biennial count showed an increase in unhoused young adults ages 18 to 24, for example, Heyhoe said advocates developed a new pilot program aimed at preventing youth homelessness.—
Claire Wang,
Oc Register,
27 Jan. 2026
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Over a massive 13 years, the scientists focused on a small whale population in Alaska’s Bristol Bay, connecting genetic information on 623 individuals as well as observing their social groups and ages.—
New Atlas,
New Atlas,
25 Jan. 2026
Noun
-
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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James both longs for a family reckoning and does everything in his power to avoid one.—
Theater Critic,
Los Angeles Times,
28 Jan. 2026
-
In that production, Deborah Gilmour Smyth, Lamb’s’ associate artistic director, portrayed Jessie Mae Watts, Carrie’s testy daughter-in-law in the unhappy Houston home Carrie longs to leave.—
David L. Coddon,
San Diego Union-Tribune,
16 Jan. 2026
Noun
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Saturn's largest moons Titan, Dione, Rhea and Tethys will also be visible as bright specs of light extending to one side of the gas giant's disk.—
Anthony Wood,
Space.com,
22 Jan. 2026
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Jupiter also has dozens and dozens of orbiting moons, four of which can easily be seen using just about any telescope or even a cheap pair of binoculars.—
Mike Lynch,
Twin Cities,
18 Jan. 2026
Cite this Entry
“Blue moons.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moons. Accessed 2 Feb. 2026.
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