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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Example Sentences
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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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Miami trailed 1-0 fast, in the sixth minute, when the defense left Guilherme Biro unmarked for a downward header off a corner kick, gifting Biro the forever-history of the first goal in the new stadium.—
Miami Herald,
Miami Herald,
5 Apr. 2026
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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
Noun
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Kaia Gerber has officially become the latest in a long of line of celebrities to co-sign the peek-a-bra trend.—
Emma Banks,
InStyle,
9 Apr. 2026
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We were deprived of what every human longs for—a chance to love honestly with mind, body and soul.—
Donna Lamb,
MSNBC Newsweek,
31 Mar. 2026
Noun
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So Mom clears them out, taking them to a nearby nature preserve and natural-history museum, where the sharp-eyed Sasha notices the teen-age Jeremy stealing a souvenir keychain from a rotating rack.—
Richard Brody,
New Yorker,
12 Apr. 2026
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Your Cardiovascular Health Can Improve Quickly Arteries naturally stiffen with age, which can raise your risk of heart attack and stroke.—
MD Published,
Verywell Health,
11 Apr. 2026
Noun
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Crew awaits trip around moon, celebrates Easter The Artemis II astronauts sent down Easter greetings as their Orion spacecraft carried them toward a pass over the moon's normally unseen far side the following day.—
Mark Osborne,
CBS News,
11 Apr. 2026
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Our moon still holds many mysteries The Apollo program revealed new insights into the moon’s origin and composition, while also revealing enduring mysteries — ones that could be solved using observations taken during Artemis II and subsequent missions.—
Jackie Wattles,
CNN Money,
11 Apr. 2026
Cite this Entry
“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 18 Apr. 2026.
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