Definition of "act of terrorism" [act of terrorism]
The calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear(noun)
WordNet. Princeton University. 2010.
Use "act of terrorism" in a sentence
"None of the Lackawanna Six was ever accused of planning an act of terrorism nor had they ever joined al-Qaeda."