TERRORISM (noun).

1. the use of violence and threats to intimidate or coerce, esp. for political purposes.
2. the state of fear and submission produced by terrorism or terrorization.
3. a terroristic method of governing or of resisting a government.

* Excerpted from the Random House Webster's Unabridged Dictionary 3.0.

Note: For more on the definition of terrorism go to (one of my terrorism pages).