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
Super blue moons can also occur, but don’t be fooled by the name.
—
Callum Sutherland, Time, 6 Oct. 2025
But sometimes, once in a magical blue moon, a star will stray from the norm—and pop up in the most random of places.
—Christian Allaire, Vogue, 18 Sep. 2025
But a blue moon isn’t supposed to last for a year.
—Brett Owens, Forbes.com, 1 Sep. 2025
Black moons are referenced like blue moons, which are defined as the third full moon in an astronomical season containing four full moons.
—Janet Loehrke, USA Today, 21 Aug. 2025
See All Example Sentences for blue moon
Callum Sutherland, Time, 6 Oct. 2025
But sometimes, once in a magical blue moon, a star will stray from the norm—and pop up in the most random of places.
—Christian Allaire, Vogue, 18 Sep. 2025
But a blue moon isn’t supposed to last for a year.
—Brett Owens, Forbes.com, 1 Sep. 2025
Black moons are referenced like blue moons, which are defined as the third full moon in an astronomical season containing four full moons.
—Janet Loehrke, USA Today, 21 Aug. 2025
See All Example Sentences for blue moon
Recent Examples of Synonyms for blue moon
Noun
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Those tush-pushes can’t beat you if The Winter Soldier’s facing third-and-forevers.—
Joe Nguyen,
Denver Post,
17 Jan. 2026
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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
Noun
-
The protest song longs for history.—
Mitch Therieau,
New Yorker,
7 Feb. 2026
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Before long, the film will shift gears to a third main character, Madame Suman’s daughter-in-law Nat (a steely Davika Hoorne), who recently died of lung disease and longs for her still-living husband March (Witsarut Himmarat).—
Amy Nicholson,
Los Angeles Times,
4 Feb. 2026
Noun
-
By age 2, most kids know how to play pretend.—
Adithi Ramakrishnan,
Los Angeles Times,
8 Feb. 2026
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Castle, who entered Saturday with an age of 21 years and 98 days, is the youngest player to ever put up the stat line of 40 points, 12 assists and 12 rebounds, passing Oscar Robertson, per ESPN’s Mike Wright.—
Jared Weiss,
New York Times,
8 Feb. 2026
Noun
-
Try to get all of it, even though your potato may look a little moon-like.—
Aly Walansky,
Southern Living,
7 Feb. 2026
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There are also boulder-size chunks of moon rocks and meteorites that crash-landed on Earth that children can touch and smell.—
John Arlidge,
Travel + Leisure,
7 Feb. 2026
Cite this Entry
“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 15 Feb. 2026.
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