watch•dogPronunciation: (woch'dôg", -dog"), [key]
—n., adj., v., -dogged, -dog•ging.
a dog kept to guard property.
a watchful guardian: a self-appointed watchdog of the public morals.
of, pertaining to, or characteristic of a watchdog.
organized or functioning as a watchful guardian, esp. against illegal or unethical conduct: a watchdog group in the legislature.
to watch carefully, esp. so as to detect illegal or unethical conduct.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.