One of the defining features of the post-9/11 world is the extent to which terrorism has become a key organising principle for domestic and international politics. Introduced by an essay exploring the complex nature of terrorism and with more than 250 entries, each containing suggestions for further reading, the Dictionary of Terrorism provides an overview of the key themes, individuals, organizations and tactics that have shaped terrorism throughout history and into the contemporary world. It covers: Events such as the 9/11 attacks and the 7/7 London bombingsTerrorist organizations from the Assassins of the first century to the modern Zapatista Army of National LiberationBiographies of individual terrorists ranging from Abu Ayyub al-Masri to Abu Zubaydah with extensive coverage given to key figures such as Osama bin LadenTerrorist tactics such as bombings, hijacking and hostage takingKey international counter-terrorism conventions The Dictionary of Terrorism is an easily accessible resource for undergraduate and postgraduate students, researchers, policy-makers and anyone seeking to understand the nature of political, ethnic and religious violence in the world today.