The Collaborative International Dictionary of English v.0.48:

Seduction \Se*duc*tion\, n. [L. seductio: cf. F. s['e]duction.
   See Seduce.]
   1. The act of seducing; enticement to wrong doing; enticement
      to fail in some duty.
      [1913 Webster]

   2. Specifically:
      (a) The offense of inducing a woman to consent to unlawful
          sexual intercourse, by enticements which overcome her
          scruples; the wrong or crime of persuading a woman to
          surrender her chastity. [Archaic]
      (b) Any successful enticement to engage in some sexual
          activity, especially intercourse.
          [1913 Webster +PJC]

   3. That which seduces, or is adapted to seduce; means of
      leading astray; as, the seductions of wealth.
      [1913 Webster]

WordNet (r) 3.0 (2006):

seduction
    n 1: enticing someone astray from right behavior
    2: an act of winning the love or sexual favor of someone [syn:
       seduction, conquest]

Moby Thesaurus II by Grady Ward, 1.0:

65 Moby Thesaurus words for "seduction":
   abuse, agacerie, allure, allurement, appeal, attraction,
   attractiveness, beguilement, beguiling, betrayal, bewitchery,
   bewitchment, blandishment, cajolery, call, captivation, charisma,
   charm, charmingness, come-hither, corruption, criminal assault,
   debauchment, defilement, defloration, deflowering, degradation,
   despoilment, draw, drawing power, enchantment, enthrallment,
   enticement, entrapment, fascination, flirtation, forbidden fruit,
   glamour, inducement, interest, inveiglement, invitation, lorelei,
   lure, magnetism, perversion, priapism, pull, rape, ravage,
   ravishment, ruin, seducement, seductiveness, sex appeal,
   sexual assault, siren song, snaring, tantalization, temptation,
   violation, winning ways, winsomeness, witchery, wooing