term:

Terrorism

terrorism n

1 : the unlawful use or threat of violence esp. against the state or the public as a politically motivated means of attack or coercion
2 : violent and intimidating gang activity [street ]
ter·ror·ist [-ist]
adj or n

ter·ror·is·tic [ter-ər-is-tik]
adj

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.