a·troc·i·ty 
(ə-trŏsĭ-tē)
(ə-trŏsĭ-tē)n. pl. a·troc·i·ties
1. Appalling or atrocious condition, quality, or behavior; monstrousness.
2. An appalling or atrocious act, situation, or object, especially an act of unusual or illegal cruelty inflicted by an armed force on civilians or prisoners.