1. A description of people or actions that show an intention or desire to hurt someone or something very badly: The police were accused of viciously attacking the street demonstrators with pepper spray.
2. A depiction of an object, condition, or remark that causes great physical or emotional pain: Sara's viciously cruel remarks were aimed at the woman who was perceived as her rival in the affections of the man she admired.
3. Corruptly; in a manner contrary to what is considered right and a corruption of moral principles, propriety or purity: Manfred turned on his political opponents, viciously accusing them of lying.