out of the blue
out
aʊt
awt
of
əv
ēv
the
ðə
dhē
blue
blu:
bloo

Definition & Meaning of "out of the blue"in English

out of the blue
01

occurring without prior warning 

Examples
The invitation to the party came out of the blue, and I couldn't believe my luck. 
out of the blue
01

in a way that was not expected 

Grammatical Information
02

being quiet or still or inactive 

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