The Collaborative International Dictionary of English v.0.48:

Slaughter \Slaugh"ter\, v. t. [imp. & p. p. Slaughtered; p.
   pr. & vb. n. Slaughtering.]
   1. To visit with great destruction of life; to kill; to slay
      in battle.
      [1913 Webster]

            Your castle is surprised; your wife and babes
            Savagely slaughtered.                 --Shak.
      [1913 Webster]

   2. To butcher; to kill for the market, as beasts.
      [1913 Webster]