The Collaborative International Dictionary of English v.0.48:

entrancing \entrancing\ adj.
   same as enthralling.

   Syn: bewitching, captivating, enchanting, enthralling,
        fascinating.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Entrance \En*trance"\, v. t. [imp. & p. p. Entranced; p. pr. &
   vb. n. Entrancing.] [Pref. en- + trance.]
   1. To put into a trance; to make insensible to present
      objects.
      [1913 Webster]

            Him, still entranced and in a litter laid,
            They bore from field and to the bed conveyed.
                                                  --Dryden.
      [1913 Webster]

   2. To put into an ecstasy; to ravish with delight or wonder;
      to enrapture; to charm.
      [1913 Webster]

            And I so ravished with her heavenly note,
            I stood entranced, and had no room for thought.
                                                  --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

entrancing
    adj 1: capturing interest as if by a spell; "bewitching smile";
           "Roosevelt was a captivating speaker"; "enchanting
           music"; "an enthralling book"; "antique papers of
           entrancing design"; "a fascinating woman" [syn:
           bewitching, captivating, enchanting, enthralling,
           entrancing, fascinating]