Murder/ˈmɜːrdər/ Definition 1 of 5Pro Tip 1/3Intentional Crime Stresses the deliberate aspect of the crime, differentiating it from accidents. The murderer showed no remorse for his intentional action. Pro Tip 2/3Unlawful Killing Highlights the illegal nature, used mainly in legal and formal contexts. The suspect is being charged with the unlawful murder of a civilian. Pro Tip 3/3Severity and Seriousness Conveys the gravity and strong legal consequences of the act. Murder is considered one of the most heinous crimes in society.