Adult learning and education is a core component of lifelong learning. It comprises all forms of education and learning that aim to ensure that all adults participate in their societies and the world of work. It denotes the entire body of learning processes, formal, non-formal and informal, whereby those regarded as adults by the society in which they live, develop and enrich their capabilities for living and working, both in their own interests and those of their communities, organizations and societies.
Adult learning and education involves sustained activities and processes of acquiring, recognizing, exchanging, and adapting capabilities. Given that the boundaries of youth and adulthood are shifting in most cultures, in this text the term “adult” denotes all those who engage in adult learning and education, even if they have not reached the legal age of maturity.

Source: UNESCO/UNESCO-UIL(CONFINTEA) VI 2016, Global