The Collaborative International Dictionary of English v.0.48:

Venom \Ven"om\, n. [OE. venim, OF. venim, venin, F. venin, L.
   venenum. Cf. Venenate.]
   1. Matter fatal or injurious to life; poison; particularly,
      the poisonous matter which certain animals, such as
      serpents, scorpions, bees, etc., secrete in a state of
      health, and communicate by biting or stinging.
      [1913 Webster]

            Or hurtful worm with cankered venom bites. --Milton.
      [1913 Webster]

   2. Spite; malice; malignity; evil quality. --Chaucer. "The
      venom of such looks." --Shak.
      [1913 Webster]

   Syn: Venom; virus; bane. See Poison.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Venom \Ven"om\, v. t. [OE. venimen, OF. venimer, L. venenare.
   See Venom, n.]
   To infect with venom; to envenom; to poison. [R.] "Venomed
   vengeance." --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

venom
    n 1: toxin secreted by animals; secreted by certain snakes and
         poisonous insects (e.g., spiders and scorpions)
    2: feeling a need to see others suffer [syn: malice,
       maliciousness, spite, spitefulness, venom]