Meaning of the word onlooker in English

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

onlooker

US /ˈɑːnˌlʊk.ɚ/
UK /ˈɒnˌlʊk.ər/

Noun

a person who watches something happening without taking part

Example:
The police asked the onlookers to move back.
A crowd of onlookers gathered at the scene of the accident.