'Viciousness' definitions:

Definition of 'viciousness'

noun

The trait of extreme cruelty [syn: ferociousness, brutality, viciousness, savagery]

From: GCIDE

Vicious \Vi"cious\, a. [OF. vicious, F. vicieux, fr. L. vitiosus, fr. vitium vice. See Vice a fault.]
1. Characterized by vice or defects; defective; faulty; imperfect. [1913 Webster]
Though I perchance am vicious in my guess. --Shak. [1913 Webster]
The title of these lords was vicious in its origin. --Burke. [1913 Webster]
A charge against Bentley of vicious reasoning. --De Quincey. [1913 Webster]
2. Addicted to vice; corrupt in principles or conduct; depraved; wicked; as, vicious children; vicious examples; vicious conduct. [1913 Webster]
Who . . . heard this heavy curse, Servant of servants, on his vicious race. --Milton. [1913 Webster]
3. Wanting purity; foul; bad; noxious; as, vicious air, water, etc. --Dryden. [1913 Webster]
4. Not correct or pure; corrupt; as, vicious language; vicious idioms. [1913 Webster]
5. Not well tamed or broken; given to bad tricks; unruly; refractory; as, a vicious horse. [1913 Webster]
6. Bitter; spiteful; malignant. [Colloq.] [1913 Webster]
Syn: Corrupt; faulty; wicked; depraved. [1913 Webster] -- {Vi"cious*ly}, adv. -- {Vi"cious*ness}, n. [1913 Webster]