1. a person who watches something happening but is not directly involved

Examples

• A crowd of onlookers gathered to watch the street performance.
• The accident drew several onlookers who stopped to see what happened.
• She felt uncomfortable with so many onlookers staring at her presentation.
• The police asked onlookers to move back from the crime scene.
• As an onlooker, he could see the situation more objectively than those involved.
• The parade attracted thousands of onlookers lining the streets.