Definition of: vermin

(vûr′min) noun plural ·min
1. Noxious small animals or parasitic insects, as lice, fleas, worms, rats, mice, etc.
2. Brit. Certain animals injurious to game, as weasels, owls, etc.
3. A repulsive or noxious human being, or such persons collectively. [<OF <L vermis a worm]