Malice (law) in the context of "Murder"

A villain (masculine), or villainess (feminine), also bad guy, baddy or baddie (sometimes known as a "black hat"), is a stock character, whether based on a historical narrative or one of literary fiction. Random House Unabridged Dictionary defines such a character as "a cruelly malicious person who is involved in or devoted to wickedness or crime; scoundrel; or a character in a play, novel, or the like, who constitutes an important evil agency in the plot". The antonym of a villain is a hero.

The villain's structural purpose is to serve as the opposite to the hero character, and their motives or evil actions drive a plot along. In contrast to the hero, who is defined by feats of ingenuity and bravery and the pursuit of justice and the greater good, a villain is often defined by their acts of selfishness, evilness, arrogance, cruelty, and cunning, displaying immoral behavior that can oppose or pervert justice.

Oppression is malicious or unjust treatment of, or exercise of power over, a group of individuals, often in the form of governmental authority. There are many scholars who have attempted to define oppression usually by the types of harm suffered by those who are persecuted.

In cybersecurity, a threat actor, bad actor or malicious actor is either a person or a group of people that take part in malicious acts in the cyber realm, including computers, devices, systems, or networks. Threat actors engage in cyber related offenses to exploit open vulnerabilities and disrupt operations. Threat actors have different educational backgrounds, skills, and resources. The frequency and classification of cyber attacks changes rapidly. The background of threat actors helps dictate who they target, how they attack, and what information they seek. There are a number of threat actors including: cyber criminals, nation-state actors, ideologues, thrill seekers/trolls, insiders, and competitors. These threat actors all have distinct motivations, techniques, targets, and uses of stolen data.

Malice aforethought is the "premeditation" or "predetermination" (with malice) required as an element of some crimes in some jurisdictions and a unique element for first-degree or aggravated murder in a few. Insofar as the term is still in use, it has a technical meaning that has changed substantially over time.