1. dogs kept to guard property or warn of intruders
2. people or organizations that monitor others to prevent wrongdoing or ensure compliance
Usage: figurative

Examples

• The warehouse employed two German shepherds as watchdogs.
• Fierce watchdogs patrolled the perimeter of the compound.
• Consumer advocacy groups serve as watchdogs for unfair business practices.
• Environmental watchdogs monitor pollution levels in the river.
• The media acts as watchdogs over government activities.
• Independent watchdogs investigate corporate fraud.
• These organizations function as watchdogs for human rights violations.