blue moon

[ bloo-moon ]

/ ˈblu ˈmun /

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See synonyms for blue moon on Thesaurus.com

idiom

a very long period of time: Such a chance comes once in a blue moon.

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Origin of blue moon

First recorded in 1815–25

Words nearby blue moon

blue melilot, blue merle, blue mockingbird, blue mold, blue Monday, blue moon, blue mould, Blue Mountains, blue mud, blue murder, blue myrtle

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use blue moon in a sentence

I go back and forth between feeling like, “This is happening all around us,” versus, “This happens once in a blue moon.”
The Math That Says Egalitarianism Is Possible - Issue 104: Harmony|Brian Gallagher|August 11, 2021|Nautilus
Clad in a blue, striped button-down, a silver watch adorning his left wrist, Huckabee beams on the cover.
Huckabee 2016: Bend Over and Take It Like a Prisoner!|Olivia Nuzzi|January 8, 2015|DAILY BEAST
Yeah, the “Giant man-puppy” that is Gronkowski won't hold a sexual candle to the blue-eyed dreamboat.
‘A Gronking to Remember’ Speed Read: 8 Naughtiest Bits|Emily Shire|January 7, 2015|DAILY BEAST
GOP leaders refused; they saw that Duke was pulling blue-collar Democrats to the party.
The Louisiana Racists Who Courted Steve Scalise|Jason Berry|January 3, 2015|DAILY BEAST

It denotes the person that puts on the badge, puts on the blue uniform, and goes into the streets to put their life at risk.
Cop Families Boo De Blasio at NYPD Graduation|Michael Daly|December 30, 2014|DAILY BEAST
They looked up into the blue sky as the helicopters flew over in a lost man formation.
Choking Back Tears, Thousands of Cops Honor Fallen Officer Ramos|Michael Daly|December 28, 2014|DAILY BEAST
The moon seemed to smile on him; the aurora appeared to dance with unwonted vigour, as if in glee; the very stars winked at him!
The Giant of the North|R.M. Ballantyne
In pursuing his alchemical researches, he discovered Prussian blue, and the animal oil which bears his name.
The Every Day Book of History and Chronology|Joel Munsell
Mary is fair as the morning dew— Cheeks of roses and ribbons of blue!
Boys and Girls Bookshelf; a Practical Plan of Character Building, Volume I (of 17)|Various
His nose was hooked and rather large, his eyes were blue, bright as steel, and set a trifle wide.
St. Martin's Summer|Rafael Sabatini
The most promising of the methods which have been devised are cryoscopy, the methylene-blue test, and the phloridzin test.
A Manual of Clinical Diagnosis|James Campbell Todd

British Dictionary definitions for blue moon

blue moon

noun

the second full moon occurring within a calendar month

once in a blue moon informal very rarely; almost never

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

blue moon

Origin of blue moon

Words nearby blue moon

Words related to blue moon

How to use blue moon in a sentence

British Dictionary definitions for blue moon