as in forever
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 moon
The August 2025 full moon is not a rare super blue moon.
—
Tiffany Acosta, AZCentral.com, 2 Aug. 2025
This spectacle will have a window of ideal visibility through February 21.
March 14: Total lunar eclipse
Sometimes, full moons get called colorful names that are a bit of a fake-out: A blue moon isn’t really blue, and a pink moon isn’t really pink.
—Carlyn Kranking, Smithsonian Magazine, 30 Dec. 2024
Their version of Superman was made with blue moon, red pop and lemon flavors.
—Jalen Williams, Detroit Free Press, 22 Dec. 2024
There's also a lot of supermoons in 2024 — four in a row, in fact, which began in August with a rare seasonal blue moon.
—John Tufts, The Courier-Journal, 4 Sep. 2024
See All Example Sentences for blue moon
Tiffany Acosta, AZCentral.com, 2 Aug. 2025
This spectacle will have a window of ideal visibility through February 21.
March 14: Total lunar eclipse
Sometimes, full moons get called colorful names that are a bit of a fake-out: A blue moon isn’t really blue, and a pink moon isn’t really pink.
—Carlyn Kranking, Smithsonian Magazine, 30 Dec. 2024
Their version of Superman was made with blue moon, red pop and lemon flavors.
—Jalen Williams, Detroit Free Press, 22 Dec. 2024
There's also a lot of supermoons in 2024 — four in a row, in fact, which began in August with a rare seasonal blue moon.
—John Tufts, The Courier-Journal, 4 Sep. 2024
See All Example Sentences for blue moon
Recent Examples of Synonyms for blue moon
Noun
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One way to mess with an option team’s Plan A is to not only stick them with third-and-forevers, but to put them in an early hole, making them throw out of desperation.—
Sean Keeler,
The Denver Post,
14 Sep. 2019
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Printed with thermochromic ink, the stamp reveals a second image of the moon when a finger is pressed to it, and a sheet of 16 Forever stamps features a map of the eclipse path.—
Meg Jones,
Milwaukee Journal Sentinel,
18 Aug. 2017
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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James Watson, who co-discovered the double-helix structure of DNA in 1953, has died at age 97.—
Sophia Compton,
FOXNews.com,
8 Nov. 2025
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Especially coats and other winter clothing and accessories likes hats and gloves for all sizes and ages and blankets.—
Kansas City Star,
Kansas City Star,
7 Nov. 2025
Noun
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The star will be visible tonight, appearing slightly above the rising moon.—
Tiffany Acosta,
AZCentral.com,
6 Jan. 2026
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This upcoming moon trek will also help advance the International Lunar Research Station (ILRS), a collaboration involving China, Russia and a number of other countries to set up a base near the lunar south pole.—
Leonard David,
Space.com,
6 Jan. 2026
Cite this Entry
“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 11 Jan. 2026.
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