International Terrorism has no specific definition; although many efforts have been made to do so. The elements of International Terrorism as defined by 1937 Convention for the Punishment and Prevention of Terrorism are:
Criminal acts against a state and intended or calculated to create a state of terror in the minds of particular persons, or a group of persons of the general public.
The essential elements are Criminal acts directed against a state and intention to create a state of terror as described above. Other Conventions dealing with seizure of Aircraft expand the above definition to include such unlawful acts by seizing control of aircraft, or attempting to do so.