adj bitter; spiteful; malignant.
2. vicious ·adj characterized by vice or defects; defective; faulty; imperfect.
3. vicious ·adj wanting purity; foul; bad; noxious; as, vicious air, water, ·etc.
4. vicious ·adj not correct or pure; corrupt; as, vicious language; vicious idioms.
5. vicious ·adj not well tamed or broken; given to bad tricks; unruly; refractory; as, a vicious horse.
6. vicious ·adj addicted to vice; corrupt in principles or conduct; depraved; wicked; as, vicious children; vicious examples; vicious conduct.