In law and legal studies there is a culture of definition. Defining concepts, interpreting actions and categorizing them is an integral part of legal research and practice. Yet, this definitional effort has always found significant limitations when faced to multifaceted and complex concepts. Different interpretations – rightly – emerge, contributing to create a plurality of approaches and practical implementations. In constitutional law, one of the most debated concepts is the very notion of ‘constitution’. Not to mention instances where the level of abstraction further increases, such as in the case of ‘constitutionalism’ or ‘constitutionalisation’.