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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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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Nonetheless, Kishimori chose the United States as his first overseas trip at age 20 and then chose the United States as his first destination after joining the Japanese Foreign Service.—
Carol Cain,
Freep.com,
4 Oct. 2025
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For more animal fun, head to Santa Ynez Valley Horseback Rides, which has trail rides along the Santa Ynez River for ages eight and up, plus family fun rides for ages six and up and a pony encounter for families with younger kids.—
Beth Luberecki,
USA Today,
4 Oct. 2025
Cite this Entry
“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 9 Oct. 2025.
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