Allegorical representation of the Vice of Envy, by Federico Zuccari
Vice is a practice, behaviour, or habit generally considered immoral, sinful, criminal, rude, taboo, depraved, or degrading in the associated society. In more minor usage, vice can refer to a fault, a negative character trait, a defect, an infirmity, or a bad or unhealthy habit. Vices are usually associated with a transgression in a person's character or temperament rather than their morality. Synonyms for vice include fault, sin, depravity, iniquity, wickedness, and corruption.
The opposite of vice is virtue.