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
nest 4
noundomain: group
Princeton WordNet [ver.3.1]
English
Definition
a gang of people (criminals or spies or terrorists) assembled in one locality
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