Meaning of the word "over the moon" in English

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

over the moon

US /ˌoʊvər ðə ˈmuːn/
UK /ˌəʊvə ðə ˈmuːn/

Idiom

extremely happy and excited

Example:
She was over the moon when she heard the news of her promotion.
We're all over the moon about the new baby.