The Collaborative International Dictionary of English v.0.48:

Carnage \Car"nage\, n. [F. carnage, LL. carnaticum tribute of
   animals, flesh of animals, fr. L. caro, carnis, flesh. See
   Carnal.]
   1. Flesh of slain animals or men.
      [1913 Webster]

            A miltitude of dogs came to feast on the carnage.
                                                  --Macaulay.
      [1913 Webster]

   2. Great destruction of life, as in battle; bloodshed;
      slaughter; massacre; murder; havoc.
      [1913 Webster]

            The more fearful carnage of the Bloody Circuit.
                                                  --Macaulay.
      [1913 Webster]

WordNet (r) 3.0 (2006):

carnage
    n 1: the savage and excessive killing of many people [syn:
         slaughter, massacre, mass murder, carnage,
         butchery]