Meaning of the word "blue blood" in English

What does "blue blood" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

blue blood

US /ˈbluː blʌd/
UK /ˈbluː blʌd/
"blue blood" picture

Idiom

noble or aristocratic descent

Example:
Despite his humble beginnings, he married into a family of blue blood.
Her refined manners and elegant speech suggested she had blue blood.