This chapter examines definitional issues between religion and spirituality as expressed by professional practitioners. It explores similarities and differences between their definitions and descriptions, taking into account general definitions of religion and belief as found in the sociology of religion. In addition, the chapter focusses on discussing hospice professionals' views about the following: first, how religion, belief and spirituality are linked with the experiences of dying and grieving, and second, how far service users' identities in these areas are important to their lives. More specifically, the chapter examines how hospice professionals appreciate the significance that service users may place in their religion, belief or spiritual identity in relation to their experiences of dying and grieving. This information provides an initial account of what may be expected in practise and highlights further educational needs or challenges.