European Commission: Active ageing means helping people stay in charge of their own lives for as long as possible as they age and, where possible, to contribute to the economy and society.

http://ec.europa.eu/social/main.jsp?catId=1062

World Health Organization Policy framework:

 Formal work. Enact labour market and employment policies and programmes that enable the participation of people in meaningful work as they grow older, according to their individual needs, preferences and capacities (e.g., the elimination of age discrimination in the hiring and retention of older workers). Support pension reforms that encourage productivity, a diverse system of pension schemes and more flexible retirement options (e.g., gradual or partial retirement).
• Informal work. Enact policies and programmes that recognize and support the contribution that older women and men make in unpaid work in the informal sector and in caregiving in the home