The Collaborative International Dictionary of English v.0.48:

pacifism \pacifism\ n.
   the doctrine that all violence is unjustifiable.

   Syn: passivism.
        [WordNet 1.5]

   2. The belief that all international disputes can be settled
      by arbitration.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

pacifism
    n 1: the doctrine that all violence is unjustifiable [syn:
         pacifism, pacificism, passivism]
    2: the belief that all international disputes can be settled by
       arbitration [syn: pacifism, pacificism]