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
And 2024 has still more celestial events to offer, including meteor showers and a seasonal blue moon.
—Tiffany Acosta, The Arizona Republic, 2 July 2024
The creamery produces 26 core flavors, including classic chocolate, seaside caramel, blue moon, malted milk ball, bananas foster, and more, as well as a rotating selection of seasonal flavors and limited-time offerings.
—Haadiza Ogwude, The Enquirer, 24 June 2024
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
See all Example Sentences for blue moon 
Tiffany Acosta, The Arizona Republic, 2 July 2024
The creamery produces 26 core flavors, including classic chocolate, seaside caramel, blue moon, malted milk ball, bananas foster, and more, as well as a rotating selection of seasonal flavors and limited-time offerings.
—Haadiza Ogwude, The Enquirer, 24 June 2024
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
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.
Dictionary Entries Near blue moon
Cite this Entry
“Blue moon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue%20moon. Accessed 25 Jul. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share