Meaning of the word "upper lip" in English

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

upper lip

US /ˈʌpər lɪp/
UK /ˈʌpə lɪp/

Noun

the part of the mouth above the lower lip

Example:
She bit her upper lip nervously.
He had a small scar on his upper lip.