The Collaborative International Dictionary of English v.0.48:

Enthrallment \En*thrall"ment\, n.
   The act of enthralling, or state of being enthralled. See
   Inthrallment.
   [1913 Webster]

WordNet (r) 3.0 (2006):

enthrallment
    n 1: a feeling of great liking for something wonderful and
         unusual [syn: captivation, enchantment, enthrallment,
         fascination]