Select the most appropriate meaning of the given idiom.

Out of the blue

Completely unexpectedly

The most appropriate meaning of the idiom "out of the blue" is completely unexpectedly.

It means that something happened suddenly and without warning. The idiom is often used to describe a surprise or an unexpected event.

The other options are not correct.

• Beat someone black and blue: This means to injure someone severely.
• Loves to wear only blue colour clothes: This is not related to the idiom "out of the blue".
• Completely honestly: This means to be completely truthful.