Wellbeing is a common term in both policy and academia but it is often used in a conceptually vague way and means different things to different people. These issues may limit its potential to create the positive changes that are intended by those who promote wellbeing. Interdisciplinary research and practice offers great potential to further our understanding of, and ability to enhance, wellbeing. However, this type of research is challenging. The Foundations of Knowledge framework is suggested as one way to develop a common understanding of wellbeing in truly integrated research in this area.