Background considering the importance of social participation for quality of life and active ageing in older adults, it is an important target of social and health professionals’ interventions. A previous review of definitions of social participation in older adults included articles up to 2009; new publications and changes in the social context (e.g. social media and the COVID-19 pandemic) justify continuing this work. Objective this paper provides an updated inventory and synthesis of definitions of social participation in older adults. Based on a critical review by content experts and knowledge users, a consensual definition is proposed. Methods using a scoping study framework, four databases (MEDLINE, CINAHL, AgeLine, PsycInfo) were searched with relevant keywords. Fifty-four new definitions were identified. Using content analysis, definitions were deconstructed as a function of who, how, what, where, with whom, when, and why dimensions. Results social participation definitions mostly focused on people’s involvement in activities providing interactions with others in society or the community. According to this new synthesis and input from content experts and knowledge users, social participation can be defined as a person’s involvement in activities providing interactions with others in community life and in important shared spaces, evolving according to available time and resources, and based on the societal context and what individuals want and is meaningful to them. Conclusion a single definition may facilitate the study of active ageing and the contribution of older adults to society, socioeconomic and personal development, benefits for older adults and society, self-actualisation and goal attainment.

Background: It is important to foster social participation and health equity, especially for older adults in situations of vulnerability. Despite growing interest in vulnerability, there is no consensus regarding how to define or measure this concept. This paper provides an inventory and synthesis of definitions of and instruments measuring vulnerability in older adults.