1. Relating to or characteristic of mysticism
   "mystical religion";
   - mystic
    
2. Relating to or resembling mysticism
   "mystical theories about the securities market";
   - mystic
    
3. Having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding
   "the mystical style of Blake";
   - mysterious, mystic, occult, secret, orphic

See also: esoteric

Encyclopedia: Mystical