Thesaurus

blue moon

noun

Synonyms & Antonyms of blue moon

a long or seemingly long period of time
  • once in a blue moon we'll get dressed up and eat in a fancy restaurant

Synonyms for blue moon

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Time Traveler for blue moon

Time Traveler

The first known use of blue moon was in 1821

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Cite this Entry

“Blue moon.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/blue%20moon. Accessed 21 Jan. 2021.

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