The Collaborative International Dictionary of English v.0.48:

Taoism \Ta"o*ism\, n.
   One of the popular religions of China, sanctioned by the
   state. -- Ta"o*ist, a. & n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Taoist
    adj 1: of or relating to the popular Chinese religious system
           based on the teachings of Lao-tzu but including a
           pantheon of gods along with divination and magic; "Taoist
           temples"
    2: of or relating to the philosophical system developed by Lao-
       tzu and Chuang-tzu advocating a simple honest life
    n 1: an adherent of any branch of Taoism [syn: Taoist, Tao]