Dirk Geeraerts is Professor of Theoretical Linguistics at the University of Leuven and head of the research group Quantitative Lexicology and Variational Linguistics. He is the author of The Structure of Lexical Variation (1994), Diachronic Prototype Semantics (1997), and Words and Other Wonders (2006) and the editor, along with Hubert Cuyckens, of The Oxford Handbook of Cognitive Linguistics (2007).