noun.
Appalling or atrocious condition, quality, or behavior; monstrousness.
noun.
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.
The Century Dictionary and Cyclopedia
noun.
The state or quality of being atrocious; enormous wickedness; extreme criminality or cruelty.
noun.
A specific act of extreme heinousness or cruelty; an atrocious deed.
the GNU version of the Collaborative International Dictionary of English
noun.
Enormous wickedness; extreme heinousness or cruelty.