Meaning of the word passerby in English

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

passerby

US /ˈpæs·ərˈbɑɪ/
UK /ˈpɑː.sər.baɪ/

Noun

a person who happens to be going past something

Example:
A kind passerby helped the old woman cross the street.
The accident was witnessed by several passersby.