Source : Webster's Revised Unabridged Dictionary (1913)

Brutality \Bru*tal"i*ty\, n.; pl. {Brutalities}. [Cf. F.
   brutalit['e].]
   1. The quality of being brutal; inhumanity; savageness;
      pitilessness.

   2. An inhuman act.

            The . . . brutalities exercised in war. --Brougham.

Source : WordNet®

brutality
     n 1: the trait of extreme cruelty [syn: {ferociousness}, {viciousness},
           {savageness}, {savagery}]
     2: a brutal barbarous savage act [syn: {barbarity}, {barbarism},
         {savagery}]