In the Middle Ages, as today, the concept of magic meant different things to different people. Broadly speaking, it is possible to distinguish between two categories of definitions. To the first category, which may be called external, belong the definitions of magic provided by modern anthropologists, who seek, probably in vain, to find common denominators of “magic” in all human societies. The second category, which may be called internal, is composed of the definitions provided by individual societies or by groups (...) within those societies. In this article I shall be dealing with internal definitions, viewing the subject from the perspectives of the authorities of the early Middle Ages, who understood magic to consist in unsanctioned dealings with supernatural forces that stood outside of the official practices of church and state. Such marginal activities were referred to by a number of words, such as magia and superstitio in Latin or μαγεία and γοητεία in Greek. The written sources do not enable us to define each of these terms with much precision, except to say that in the early Middle Ages they all usually implied an unsanctioned or illicit engagement with the immaterial world, frequently involving the participation of demons. (shrink)