Counter-terrorism or counterterrorism refers to the practices, tactics, techniques, and strategies that governments, militaries, and other groups adopt in order to fight terrorism
{i} line of action intended to defeat terrorism, military or political line of action attempting to thwart terrorism, war against terror, military or political strategy intended to prevent acts of terrorism
The full range of activities directed against terrorism, including preventative and Crisis Management efforts (GAO/NSIAD) FBI's definition
Offensive measures taken to prevent, deter, and respond to terrorism (also called CT) (Joint Pub 1-02)
Offensive measures taken by civilian and military agencies of the government to prevent, deter, and respond to terrorism