blue moon Rate this phrase:(0.00 / 0 votes)
The third full moon in a quarter that contains four rather than the usual three full moons.

Additional definitions for 'blue moon':

blue moonA long time.
blue moonSomething absurd.
blue moonThe moon tinted towards blue as it appears in the sky, caused by dust or smoke in the atmosphere.
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"blue moon." STANDS4 LLC, 2018. Web. 19 Oct. 2018. <>.

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