1. out of the blue - Adverb
2. out of the blue - Phrase
3. out of the blue - Adjective Satellite
not anticipated
in a way that was not expected
Source: WordNetHappiness does not fall out of the blue and dreams will not come true by themselves. We need to be down-to-earth and work hard. We should uphold the idea that working hard is the most honorable, noblest, greatest and most beautiful virtue. Xi Jinping
You might question a winkle - a feeling that came to you right out of the blue - but you didn't question knowing. Stephen King
Maybe it's just hiding somewhere. Or gone on a trip to come home. But falling in love is always a pretty crazy thing. It might appear out of the blue and just grab you. Who knows - maybe even tomorrow. Haruki Murakami
The melodic idea which suddenly falls upon me out of the blue appears in the imagination immediately, unconsciously, uninfluenced by reason. It is the greatest gift of the divinity and cannot be compared with anything else. Richard Strauss
Only peril can bring the French together. One can't impose unity out of the blue on a country that has 265 different kinds of cheese. Charles de Gaulle
I was appointed Poet Laureate. It came totally out of the blue because most Poet Laureates had been considerably older than I. It was not something that I even had begun to dream about! Rita Dove