n. Any noxious or troublesome animal: mostly used in a collective sense.n. A worm; a reptile.n. A noxious or disgusting insect, especially a parasite; particularly, a louse, a bedbug, or a flea, A mammal or bird injurious to game, aud mischievous or troublesome in game-preserves: chiefly an English usage. Such quadrupeds as badgers, otters, weasels, polecats, rats, and mice, and such birds as hawks and owls, are all called vermin.n. Hence A contemptible or obnoxious person; a low or vile fellow; also, such persons collectively.To rid or clear of vermin.