Terrorism

Definitions:

 

Class Definition

The unlawful use or threatened use of force or violence by a person or an organized group against people or property with the intention of intimidating or coercing societies or governments, often for ideological, social, religious, or political reasons, not primarily for monetary gain.
 

FBI definition

Terrorism is the unlawful use of force or violence against persons or property to intimidate or coerce a government, the civilian population, or any segment thereof, in furtherance of political or social objectives.

Others

bulletAct of Terrorism = Peacetime Equivalent of War Crime --proposed  to UN Crime Branch
bulletTerrorism is the use or threatened use of force designed to bring about political change. --Brian Jenkins
bulletTerrorism consitutes the illegitimate use of force to achieve a political objective when innocent people are targeted. --Walter Laqueur
bulletTerrorism is the premeditated, deliberate, systematic murder, mayhem, and threatening of the innocent to create fear and intimidation in order to gain a political or tactical advantage, usually to influence an audience. --James M. Poland
bulletTerrorism is the unlawful use or threat of violence against persons or property to further political or social objectives. It is usually intended to intimidate or coerce a government, individuals or groups, or to modify their behavior or politics. --Vice-President's Task Force, 1986
bulletTerrorism is an anxiety-inspiring method of repeated violent action, employed by (semi-) clandestine individual, group or state actors, for idiosyncratic, criminal or political reasons, whereby - in contrast to assassination - the direct targets of violence are not the main targets. The immediate human victims of violence are generally chosen randomly (targets of opportunity) or selectively (representative or symbolic targets) from a target population, and serve as message generators. Threat- and violence-based communication processes between terrorist (organization), (imperilled) victims, and main targets are used to manipulate the main target (audience(s)), turning it into a target of terror, a target of demands, or a target of attention, depending on whether intimidation, coercion, or propaganda is primarily sought."  --Academic Consensus Definition