The Glossary Living Document is a summary of the ENHANCE research efforts to understand the meaning and correlative elements of the concept of transdisciplinarity within the Alliance. The aim was to develop this glossary structure, spread and improve knowledge and raise awareness of transdisciplinary approaches in research, projects and collaborations towards a greater public. We propose an open, expandable, adaptable and updatable glossary as a space for the continuous collection of experiences, knowledge, competences and skills for transdisciplinary activities.