The Collaborative International Dictionary of English v.0.48:

Seduce \Se*duce"\, v. t. [imp. & p. p. Seduced; p. pr. & vb.
   n. Seducing.] [L. seducere, seductum; pref. se- aside +
   ducere to lead. See Duke.]
   1. To draw aside from the path of rectitude and duty in any
      manner; to entice to evil; to lead astray; to tempt and
      lead to iniquity; to corrupt.
      [1913 Webster]

            For me, the gold of France did not seduce. --Shak.
      [1913 Webster]

   2. Specifically, to induce to engage in sexual intercourse.
      [PJC]

   Syn: To allure; entice; tempt; attract; mislead; decoy;
        inveigle. See Allure.
        [1913 Webster]

WordNet (r) 3.0 (2006):

seduce
    v 1: induce to have sex; "Harry finally seduced Sally"; "Did you
         score last night?"; "Harry made Sally" [syn: seduce,
         score, make]
    2: lure or entice away from duty, principles, or proper conduct;
       "She was seduced by the temptation of easy money and started
       to work in a massage parlor"

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "seduce":
   abuse, allure, attract, bait, bait the hook, becharm, beguile,
   betray, bewitch, blandish, cajole, captivate, carry away, charm,
   coax, corrupt, debauch, deceive, decoy, defile, deflower, degrade,
   delude, despoil, dishonor, draw, draw in, draw on, enamor, endear,
   enrapture, enslave, ensnare, entice, entrance, entrap, fascinate,
   flirt, flirt with, force, give the come-on, hold in thrall,
   infatuate, inflame with love, inveigle, lead astray, lead on, lure,
   mislead, offer bait to, overpower, overwhelm, pervert, rape,
   ravage, ravish, rope in, ruin, soil, suck in, sully, sweet-talk,
   tantalize, tease, tempt, train, trap, undo, vamp, violate, woo