ABSTRACT My aim in this paper is not to try to formulate the meaning the word ‘terrorism’has in ordinary use; the word is used in so many different, even incompatible ways, that such an enterprise would quickly prove futile. My aim is rather to try for a definition that captures the trait, or traits, of terrorism which cause most of us to view it with moral repugnance. I discuss the following questions: Is the historical connection of terrorism with terror to (...) be preserved on the conceptual level, or relegated to the psychology and sociology of terrorism? Does mere infliction of terror qualify as terrorism, so that we can speak of non‐violent terrorism? If terrorism is a type of violence, does it have to be against persons, or should violence against property also count? In what sense can terrorism be described as indiscriminate violence? Should we use the word only in a political context? In such a context, can we speak of ‘state terrorism’, or should the word be restricted to actions not sanctioned by law? Is the terrorist necessarily oblivious to moral considerations, as those who define terrorism in terms of antinomianism imply? My answers to these questions lead up to the following definition: terrorism is the deliberate use of violence, or threat of its use, against innocent people, with the aim of intimidating them, or other people, into a course of action they otherwise would not take. (shrink)