The Collaborative International Dictionary of English v.0.48:

Pillage \Pil"lage\, v. i. [imp. & p. p. Pillaged; p. pr. & vb.
   n. Pillaging.]
   To strip of money or goods by open violence; to plunder; to
   spoil; to lay waste; as, to pillage the camp of an enemy.
   [1913 Webster]

         Mummius . . . took, pillaged, and burnt their city.
                                                  --Arbuthnot.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pillaging
    n 1: the act of stealing valuable things from a place; "the
         plundering of the Parthenon"; "his plundering of the great
         authors" [syn: plundering, pillage, pillaging]