Meaning of the word gobsmacked in English

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

gobsmacked

US /ˈɡɑːb.smækt/
UK /ˈɡɒb.smækt/

Adjective

utterly astonished; astounded

Example:
I was completely gobsmacked when I heard the news.
She was gobsmacked by the generosity of the donation.