1. A guardian or defender against theft or illegal practices or waste
   "she is the global watchdog for human rights abuses"
    
2. A dog trained to guard property
   "The Rottweiler is often used as a watchdog for its intimidating presence";
   - guard dog

1. Keep tabs on; keep an eye on; keep under surveillance
   "The committee watchdogged the government's spending";
   - monitor, supervise

Derived forms: watchdogs, watchdogged, watchdogging

Type of: defender, guardian, observe, protector, shielder, working dog

Encyclopedia: Watchdog