The Collaborative International Dictionary of English v.0.48:

Transfix \Trans*fix"\, v. t. [imp. & p. p. Transfixed; p. pr.
   & vb. n. Transfixing.] [L. transfixus, p. p. of transfigure
   to transfix; trans across, through + figere to fix, fasten.
   See Fix.]
   To pierce through, as with a pointed weapon; to impale; as,
   to transfix one with a dart.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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