From Antiphilosophy to Worlds and from Beckett to Wittgenstein, over 90 entries in this dictionary provide detailed explanations and engagements with Badiou’s key concepts and some of his major interlocutors. They also reflect the crucial divergences in Badiou scholarship in a productive and enlightening way. Alain Badiou’s philosophical project is a genuine system in the traditional sense. It profoundly shakes up the field of thought as well as offering fresh insights into contemporary events. His concepts are becoming indispensable tools in a variety of fields, from philosophy to anthropology, including art, politics and theatre. With contributions of JVE and JVEA’s participants Bruno Besana, Pietro Bianchi, Steve Corcoran, Olivia Lucca Fraser, Dominiek Hoens, Elad Lapidot, Ozren Pupovac, Samo Tomsic, Tzuchien Tho.