once in a blue moon Meaning in the Cambridge English Dictionary Cambridge dictionaries logo

Meaning of “once in a blue moon” in the English Dictionary

"once in a blue moon" in British English

See all translations

once in a blue moon

not very often: My ​sisterlives in ​Alaska, so I only ​see her ​once in a blue ​moon.
(Definition of once in a blue moon from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"once in a blue moon" in American English

See all translations

once in a blue moon

rarely: Once in a ​bluemoon he’d ​call, but for ​months at a ​time we ​heard nothing.
(Definition of once in a blue moon from the Cambridge Academic Content Dictionary © Cambridge University Press)
Translations of “once in a blue moon”
in Chinese (Simplified) 少有地…
in Turkish ayda yılda bir, kırk yılda bir, (argo) ölme eşeğim ölme…
in Russian раз в год по обещанию, очень редко…
in Chinese (Traditional) 少有地…
in Polish raz na ruski rok…
Add Cambridge dictionaries to your browser to your website
Word of the Day

parade

a large number of people walking or in vehicles, all going in the same direction, usually as part of a public celebration of something

Word of the Day

I used to work hard/I’m used to working hard (Phrases with ‘used to’)
I used to work hard/I’m used to working hard (Phrases with ‘used to’)
by Kate Woodford,
February 10, 2016
On this blog, we like to look at words and phrases in the English language that learners often have difficulty with. Two phrases that can be confused are ‘used to do something’ and ‘be used to something/doing something’. People often use one phrase when they mean the other, or they use the wrong

Read More 

farecasting noun
farecasting noun
February 08, 2016
predicting the optimum date to buy a plane ticket, especially on a website or using an app A handful of new and updated websites and apps are trying to perfect the art of what’s known as farecasting – predicting the best date to buy a ticket.

Read More