Meaning of the word "Blank expression" in English

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

Blank expression

US /blæŋk ɪkˈsprɛʃən/
UK /blæŋk ɪkˈsprɛʃən/

Phrase

a facial expression that shows no emotion or thought

Example:
He stared at the wall with a blank expression.
Her face was a blank expression, giving away no clues.