Source : Webster's Revised Unabridged Dictionary (1913)

Communist \Com"mu*nist\, n. [F. communiste.]
   1. An advocate for the theory or practice of communism.

   2. A supporter of the commune of Paris.

Source : WordNet®

Communist
     n 1: a member of the communist party
     2: a socialist who advocates communism [syn: {commie}]