What Does “once in a blue moon” mean?
Definition:
The phrase once in a blue moon is an idiomatic expression that means not very often or very rarely.
Blue moon refers to an additional full moon that appears very rarely during a year.
The phrase has nothing to do with the actual color of the moon. It just means that something happens very rarely.
Example(s)
Once in a blue moon, her husband brings her a gift.
She sees him once in a blue moon.
This idiom is in the time category.
