Definitions for: Watchdog

[n] a dog trained to guard property

Webster (1913) Definition: Watch"dog` (w[o^]ch"d[o^]g`), n.
A dog kept to watch and guard premises or property, and to
give notice of the approach of intruders.

Synonyms: guard dog

See Also: attack dog, housedog, kuvasz, pinscher, schipperke, working dog