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
From familiar favorites like peanut butter cup and s’mores to more playful creations such as birthday cake and blue moon, Carrie’s Crispies has built a following for offering both nostalgic and unique takes on the classic treat.
—
Adrienne Davis, jsonline.com, 24 Mar. 2026
On May 31, sky-gazers can look forward to a blue moon, the second full moon in one calendar month.
—Lily Hautau, CNN Money, 27 Feb. 2026
These include three supermoons, two micromoons, a blood moon (total lunar eclipse) and a blue moon.
—Alexis Simmerman, Austin American Statesman, 29 Jan. 2026
Super blue moons can also occur, but don’t be fooled by the name.
—Callum Sutherland, Time, 6 Oct. 2025
See All Example Sentences for blue moon
Adrienne Davis, jsonline.com, 24 Mar. 2026
On May 31, sky-gazers can look forward to a blue moon, the second full moon in one calendar month.
—Lily Hautau, CNN Money, 27 Feb. 2026
These include three supermoons, two micromoons, a blood moon (total lunar eclipse) and a blue moon.
—Alexis Simmerman, Austin American Statesman, 29 Jan. 2026
Super blue moons can also occur, but don’t be fooled by the name.
—Callum Sutherland, Time, 6 Oct. 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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The Swiss research team started the electrical powering of the 312-foot-long (95-metre-long) test stand known as the Inner Triplet String (IT String) on April 20.—
Georgina Jedikovska,
Interesting Engineering,
24 Apr. 2026
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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
Noun
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In 1986, riding the long shot Ferdinand, Bill Shoemaker became the oldest jockey to win the Kentucky Derby at age 54.—
Chicago Tribune,
Chicago Tribune,
3 May 2026
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For families There are no age restrictions for younger guests, although the atmosphere is quite calm and grown-up plus there are no specific children’s amenities or facilities in the restaurant.—
Condé Nast,
Condé Nast Traveler,
2 May 2026
Noun
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First, locate the radiant to the left of the waning moon using a handy smartphone stargazing app.—
Anthony Wood,
Space.com,
2 May 2026
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To Napoleon, the orange sliver of moon looked like a smile.—
Robin Romm,
The Atlantic,
2 May 2026
Cite this Entry
“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 9 May. 2026.
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