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
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
Tuesday's supermoon will mark the second of four consecutive supermoons, the next being Thursday, Oct. 17:
Aug. 19: super blue moon
Sept. 17: supermoon, harvest moon and partial lunar eclipse
Oct. 17: supermoon
Nov. 15: supermoon
More:Missed the rare super blue moon?
—Alexis Simmerman, Austin American-Statesman, 16 Sep. 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
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
Tuesday's supermoon will mark the second of four consecutive supermoons, the next being Thursday, Oct. 17:
Aug. 19: super blue moon
Sept. 17: supermoon, harvest moon and partial lunar eclipse
Oct. 17: supermoon
Nov. 15: supermoon
More:Missed the rare super blue moon?
—Alexis Simmerman, Austin American-Statesman, 16 Sep. 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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No one has drains in this long.—
Lexy Perez,
HollywoodReporter,
23 Sep. 2025
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TreVeyon Henderson had rushed for 27 yards, led by a long of 14.—
Oliver Thomas,
Forbes.com,
8 Sep. 2025
Noun
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The first quarter moon in Capricorn advises taking charge and addressing shared resources.—
USA TODAY,
USA Today,
29 Sep. 2025
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The European Space Agency (ESA) has set its sights on Saturn’s icy moon Enceladus by announcing a new Voyage 2050 mission.—
Chris Young,
Interesting Engineering,
29 Sep. 2025
Noun
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The typical Gen Xer began saving for retirement at age 30, half a decade later than millennials, according to research by the Transamerica Center for Retirement Studies.—
Daniel de Visé,
USA Today,
27 Sep. 2025
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After graduating from college, Pendleton began her career as a cartographic engineer, designing and modifying maps at the dawn of the computer age.—
Jemma Stephenson,
San Diego Union-Tribune,
26 Sep. 2025
Cite this Entry
“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 30 Sep. 2025.
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