Killing refers to the act of causing the death of a living being, typically a human or an animal. It can occur in various contexts, such as self-defense, warfare, or criminal activity. The motivations behind killing can vary widely, including emotional, psychological, or situational factors. In legal terms, killing can be classified into different categories, such as murder, manslaughter, and justifiable homicide. Each category has specific definitions and consequences under the law. The ethical implications of killing are often debated in philosophy, law, and society, raising questions about morality and justice.