This volume is the first collection of papers that is exclusively dedicated to the concept of exaptation, a notion from evolutionary biology that was famously introduced into linguistics by Roger Lass in 1990. The past quarter-century has seen a heated debate on the properties of linguistic exaptation, its demarcation from other processes of linguistic change, and indeed the question of whether it is a useful concept in historical linguistics at all. The contributions in the present volume reflect these diverging points of view. Along with a comprehensive introduction, covering the history of...