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
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
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
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
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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There were handoffs on third-and-longs.—
Alex Zietlow,
Charlotte Observer,
29 Sep. 2025
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No one has drains in this long.—
Lexy Perez,
HollywoodReporter,
23 Sep. 2025
Noun
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This is when the new moon for October begins, and without a moon lighting the sky, other objects become a lot more visible from Earth.—
Callum Sutherland,
Time,
6 Oct. 2025
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This moon will be the first of three back-to-back supermoons this year.—
Gina Park,
CNN Money,
6 Oct. 2025
Noun
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But Takaichi gave up her beloved Kawasaki Z400GP motorcycle after becoming a lawmaker in 1993 at age 32, reportedly to avoid accidents that could hinder her work.—
Hanako Montgomery,
CNN Money,
11 Oct. 2025
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He was thrilled when, at age 12, his parents bought a Baldwin grand piano secondhand from the University of Central Arkansas.—
Arkansas Online,
Arkansas Online,
11 Oct. 2025
Cite this Entry
“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 14 Oct. 2025.
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