The Collaborative International Dictionary of English v.0.48:

Fascinate \Fas"ci*nate\, v. t. [imp. & p. p. Fascinated, p.
   pr. & vb. n.. Fascinating.] [L. fascinare; cf. Gr.
   ?????????? to slander, bewitch.]
   1. To influence in an uncontrollable manner; to operate on by
      some powerful or irresistible charm; to bewitch; to
      enchant.
      [1913 Webster]

            It has been almost universally believed that . . .
            serpents can stupefy and fascinate the prey which
            they are desirous to obtain.          --Griffith
                                                  (Cuvier).
      [1913 Webster]

   2. To excite and allure irresistibly or powerfully; to charm;
      to captivate, as by physical or mental charms.
      [1913 Webster]

            There be none of the passions that have been noted
            to fascinate or bewitch but love and envy. --Bacon.

   Syn: To charm; enrapture; captivate; enchant; bewitch;
        attract.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

fascinated \fascinated\ adj.
   1. having the attention fixed by a sense of wonder.

   Syn: hypnotized, hypnotised, mesmerized, mesmerised,
        spellbound, transfixed.
        [WordNet 1.5]

   2. intensely interested in or attracted by; as, I'm very
      interested in birds; in fact I'm fascinated by them.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

fascinated
    adj 1: having your attention fixated as though by a spell [syn:
           fascinated, hypnotized, hypnotised, mesmerized,
           mesmerised, spellbound, spell-bound, transfixed]

Moby Thesaurus II by Grady Ward, 1.0:

80 Moby Thesaurus words for "fascinated":
   agape, aghast, agog, all agog, amazed, arrested, astonished,
   astounded, at gaze, attracted, awed, awestruck, becharmed,
   beguiled, bewildered, bewitched, breathless, captivated, cathectic,
   caught, charm-bound, charmed, concerned, confounded, curious,
   dumbfounded, dumbstruck, enamored, enchanted, enraptured,
   enravished, enthralled, enthusiastic, entranced, excited, fixed,
   flabbergasted, gaping, gauping, gazing, gripped, heartsmitten,
   held, hypnotized, in a trance, in awe, in awe of, infatuate,
   infatuated, interested, keen on, lost in wonder, marveling,
   mesmerized, open-eyed, openmouthed, overwhelmed, passionate,
   piqued, popeyed, puzzled, rapt, rapt in wonder, smitten,
   spell-caught, spellbound, staggered, staring, stupefied, surprised,
   tantalized, thunderstruck, tickled, titillated, turned-on,
   under a charm, under a spell, wide-eyed, wonder-struck,
   wondering