Risks have always shaped the way society has grown and evolved. Consequently, the risk concept has been studied and applied by different disciplines such as natural sciences as well as by economic, engineering, health, and insurance sectors. However, its definition and application are heterogenous and often vary among research communities. This chapter introduces the concept of risk and provides an overview of definitions and interpretations by key policy actors, including associated terms such as hazard, exposure, and vulnerability. Its use and the general importance of “risk” in the Alpine Space are emphasized, especially in the light of the increasing impacts of socioeconomic, environmental, and climatic changes on natural hazard risk by discussing resulting consequences and challenges. Furthermore, we provide an overview of the main policy actors, organizations and networks that address integrated natural hazard risk management in the Alpine Space. Keywords: risk concept hazard exposure vulnerability disaster risk reduction climate change adaptation mountain areas
