Once In A Blue Moon Idiom Meaning
To do something once in a blue moon is to do it very rarely.
Once in a blue moon idiom meaning. Once in a blue moon definition. Once in a blue moon is a common idiom which indicates that something happens only very rarely seldom only once in a long period of time. Once in a blue moon means rarely seldom not happening very often. In someplaces if there are two full moons in a calendar month the second is called a blue moon.
The phrase once in a blue moon meaning something rare or unusual came as a result of the vast eruption of the volcano on the pacific island of krakatoa. We will look at the definition of once in a blue moon where the term comes from how the meaning has changed and some examples of its use in sentences.