There is no universal agreement on the definition of terrorism. Various legal systems and government agencies use different definitions. Moreover, governments have been reluctant to formulate an agreed upon and legally binding definition. These difficulties arise from the fact that the term is politically and emotionally charged. To avoid this kind of confusion, the most common definition of terrorism is used, which includes the following:
The following criteria of violence or threat of violence fall outside of the definition of terrorism:
There are many reasons as to why there is no universal consensus regarding the definition of terrorism. Angus Martyn in a briefing paper for the Australian Parliament has stated that "The international community has never succeeded in developing an accepted comprehensive definition of terrorism. During the 1970s and 1980s, the United Nations attempts to define the term foundered mainly due to differences of opinion between various members about the use of violence in the context of conflicts over national liberation and self-determination." These divergences have made it impossible to conclude a Comprehensive Convention on International Terrorism that incorporates a single, all-encompassing, legally binding, criminal law definition of terrorism.
In the meantime, the international community adopted a series of sectoral conventions that define and criminalize various types of terrorist activities. In addition, since 1994, the United Nations General Assembly has condemned terrorist acts using the following political description of terrorism: "Criminal acts intended or calculated to provoke a state of terror in the general public, a group of persons or particular persons for political purposes are in any circumstance unjustifiable, whatever the considerations of a political, philosophical, ideological, racial, ethnic, religious or any other nature that may be invoked to justify them."
A 2003 study by Jeffrey Record for the United States Army quoted a source (Schmid and Jongman 1988) that counted 109 definitions of terrorism that covered a total of 22 different definitional elements. Record continued "Terrorism expert Walter Laqueur also has counted over 100 definitions and concludes that the 'only general characteristic generally agreed upon is that terrorism involves violence and the threat of violence.' Yet terrorism is hardly the only enterprise involving violence and the threat of violence. So does war, coercive diplomacy, and bar room brawls".