BLUE MOON


Meaning of BLUE MOON in English

Function: noun

Date: 1821

1 : a very long period of time ― usually used in the phrase once in a blue moon <such people happen along only once in a blue moon ― Saturday Rev. >

2 : a second full moon in a calendar month

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.