Meaning of the word "be beside yourself" in English

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

be beside yourself

US /bi bɪˈsaɪd jərˈsɛlf/
UK /bi bɪˈsaɪd jɔːˈsɛlf/
"be beside yourself" picture

Idiom

to be overwhelmed with a strong emotion, such as anger, grief, or excitement, to the point of losing control

Example:
She was beside herself with grief after losing her pet.
He was beside himself with joy when he heard the good news.