This page provides all possible meanings and translations of the word guard dog
Princeton's WordNetRate this definition:(0.00 / 0 votes)
watchdog, guard dog(noun)
a dog trained to guard property
WiktionaryRate this definition:(0.00 / 0 votes)
A dog used to protect a property or its owner.
FreebaseRate this definition:(0.00 / 0 votes)
A guard dog, an attack dog or watch dog is a dog used to guard against, and watch for, unwanted or unexpected people or animals. The dog is discriminating so that it does not annoy or attack familiar people.