French philosopher Alain Badiou (1937- ) has caused a worldwide stir in academic and non academic circles, partly explained by his work’s incredible breadth of engagement. The 200 entries in this dictionary provide a full survey of the extent and depth of his work. These are written by leading scholars in the field, giving expert insights into the work of Badiou while also reflecting the crucial divergences in Badiou scholarship in a way that is productive and enlightening for readers.