The Collaborative International Dictionary of English v.0.48:

Venereal \Ve*ne"re*al\, a. [L. venereus, venerius, fr. Venus,
   Veneris, Venus, the goddess of love. See Venerate.]
   1. Of or pertaining to venery, or sexual love; relating to
      sexual intercourse.
      [1913 Webster]

            Into the snare I fell
            Of fair, fallacious looks, venereal trains,
            Softened with pleasure and voluptuous life.
                                                  --Milton.
      [1913 Webster]

   2. (Med.)
      (a) Arising from sexual intercourse; as, a venereal
          disease; venereal virus or poison.
      (b) Adapted to the cure of venereal diseases; as, venereal
          medicines.
          [1913 Webster]

   3. Adapted to excite venereal desire; aphrodisiac.
      [1913 Webster]

   4. Consisting of, or pertaining to, copper, formerly called
      by chemists Venus. [Obs.] --Boyle.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Venereal \Ve*ne"re*al\, n. (Med.)
   The venereal disease; syphilis.
   [1913 Webster]

WordNet (r) 3.0 (2006):

venereal
    adj 1: of or relating to the external sex organs; "genital
           herpes"; "venereal disease" [syn: genital, venereal]