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
On Monday, a super blue moon lit up the night sky, giving people a glimpse at this rare spectacle.
—
Marley Malenfant, Austin American-Statesman, 20 Aug. 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
Tuesday’s moon followed the Aug. 19 super blue moon.
—Jaweed Kaleem, Los Angeles Times, 17 Sep. 2024
See All Example Sentences for blue moon
Marley Malenfant, Austin American-Statesman, 20 Aug. 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
Tuesday’s moon followed the Aug. 19 super blue moon.
—Jaweed Kaleem, Los Angeles Times, 17 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
-
What a child like Opal longs for is community and feeling embraced and loved.—
Mary Ann Grossmann,
Twin Cities,
10 Aug. 2025
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Saint-Saëns long had the reputation of being too expert for his own good, spinning emptily elegant spiderwebs of notes.—
Alex Ross,
New Yorker,
4 Aug. 2025
Noun
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The spawn, which typically takes place over a few days and lasts less than 20 minutes, is triggered by subtle environmental cues — moon phase, tides and water temperatures — that healthy reefs once responded to in consistent synchronization.—
Ashley Miznazi,
Miami Herald,
17 Aug. 2025
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From Jupiter’s swirling storms to Neptune’s icy depths, planets across our solar system are orbited by a fascinating cast of moons.—
Kenna Hughes-Castleberry,
Space.com,
15 Aug. 2025
Noun
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Their work in the market has considerably lowered the age of the squad and added more dynamism to a team that had started to look one-paced.—
Jordan Campbell,
New York Times,
15 Aug. 2025
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The crowd was a mix of all ages, dressed in vibrant shades of magenta and pink, Baptiste's favorite colors.—
Wren Smetana,
AZCentral.com,
15 Aug. 2025
Cite this Entry
“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 21 Aug. 2025.
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