1. (a.) Characterized by vice or defects; defective; faulty; imperfect.

2. (a.) Addicted to vice; corrupt in principles or conduct; depraved; wicked; as, vicious children; vicious examples; vicious conduct.

3. (a.) Wanting purity; foul; bad; noxious; as, vicious air, water, etc.

4. (a.) Not correct or pure; corrupt; as, vicious language; vicious idioms.

5. (a.) Not well tamed or broken; given to bad tricks; unruly; refractory; as, a vicious horse.

6. (a.) Bitter; spiteful; malignant.