A suicide attack is a deliberate attack in which the perpetrators knowingly sacrifice their own lives as part of the attack. These attacks are often associated with terrorism or military conflicts and are considered a form of murder–suicide. Suicide attacks involving explosives are commonly referred to as suicide bombings. In the context of terrorism, they are also commonly referred to as suicide terrorism. While generally not inherently regulated under international law, suicide attacks in their execution often violate international laws of war, such as prohibitions against perfidy or targeting civilians.

Terrorism, in its broadest sense, is the use of violence against non-combatants to achieve political or ideological aims. The term is used in this regard primarily to refer to intentional violence during peacetime or in the context of war against non-combatants. There are various different definitions of terrorism, with no universal agreement about it. Different definitions of terrorism emphasize its randomness, its aim to instill fear, and its broader impact beyond its immediate victims.