The work provides comprehensive, concise, practical, and interdisciplinary information on central gerontological topics and fields of intervention in 100 key terms in the completely revised and significantly expanded 2nd edition. It covers areas such as prevention throughout the life course, physical activity, cognitive health promotion, rehabilitation, interventions in nursing and the immediate spatial and technical environment, participation and engagement, as well as ethical and methodological questions. The book is aimed at everyone who understands gerontology as an interdisciplinary field of research. It should be present in the minds of all researchers and practitioners. With this excellent reference work, gerontology opens its toolbox. A book for those who deal with aging and its challenges.