blue moon
noun
1
: a very long period of time
—usually used in the phrase once in a blue moon
such people happen along only once in a blue moon—
Saturday Rev.
Saturday Rev.2
: a second full moon in a calendar month
Synonyms
Examples of blue moon in a Sentence
once in a blue moon we'll get dressed up and eat in a fancy restaurant
Recent Examples on the Web
The offer is valid for any pint of Kroger brand ice cream including Kroger Brand Deluxe Tie Dye Burst, which features swirls of vanilla, cherry and blue moon, and classic flavors like Mint Chocolate Chip, Vivid Vanilla and Chocolate Chip.
—Amy Huschka, Detroit Free Press, 19 June 2024
Super Blue Blood Moon: This is an extremely rare event in which a supermoon (when the moon is at its closest point to Earth), a blue moon and a total lunar eclipse all occur simultaneously.
—Tiffany Acosta, The Arizona Republic, 22 Apr. 2024
The beer and the actual blue moon come around far more frequently than a total solar eclipse, but the beverage pairs well with the rarest of celestial events.
—Jason Rossi, The Enquirer, 5 Apr. 2024
The second full moon in a calendar month is often referred to as a blue moon, according to the Farmers Almanac.
—The Arizona Republic, 23 Feb. 2024
See all Example Sentences for blue moon 
Amy Huschka, Detroit Free Press, 19 June 2024
Super Blue Blood Moon: This is an extremely rare event in which a supermoon (when the moon is at its closest point to Earth), a blue moon and a total lunar eclipse all occur simultaneously.
—Tiffany Acosta, The Arizona Republic, 22 Apr. 2024
The beer and the actual blue moon come around far more frequently than a total solar eclipse, but the beverage pairs well with the rarest of celestial events.
—Jason Rossi, The Enquirer, 5 Apr. 2024
The second full moon in a calendar month is often referred to as a blue moon, according to the Farmers Almanac.
—The Arizona Republic, 23 Feb. 2024
See all Example Sentences for blue moon
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'blue moon.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Blue moon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue%20moon. Accessed 4 Jul. 2024.
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