The Collaborative International Dictionary of English v.0.48:

Barbarity \Bar*bar"i*ty\, n.; pl. Barbarities. [From
   Barbarous.]
   1. The state or manner of a barbarian; lack of civilization.
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   2. Cruelty; ferociousness; inhumanity.
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            Treating Christians with a barbarity which would
            have shocked the very Moslem.         --Macaulay.
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   3. A barbarous or cruel act.
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   4. Barbarism; impurity of speech. [Obs.] --Swift.
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