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English English Dictionary
O
once in a blue moon
English English Dictionary
-
once in a blue moon
in English:
1.
very rarely
English word "once in a blue moon"(very rarely) occurs in sets:
colour idioms
colour idioms
Idioms part 3
related words
blue in English
red in English
green in English
orange in English
yellow in English
pink in English
black in English
brown in English
baby in English
purple in English
other words beginning with "O"
olive in English
on in English
once in English
one in English
onion in English
only in English
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- 
very rarely - very rarely 