noun

"Watchdog" generally refers to a person or an organization that keeps a close eye on something, such as a particular activity, organization, or system, to ensure that it operates properly and within established rules and regulations.

Example

1. The media acted as a watchdog during the election, monitoring and reporting on any potential irregularities or fraud.
2. The consumer watchdog group has called for stricter regulations on the marketing of sugary drinks to children.
3. The system's watchdog timer detected a malfunction and automatically rebooted the computer to prevent any data loss.