Wellness is the optimal state of health of individuals and groups. There are two focal concerns: the realization of the fullest potential of an individual physically, psychologically, socially, spiritually and economically, and the fulfilment of one’s role expectations in the family, community, place of worship, workplace and other settings.
Reference: New definition
Source: WHO Health Promotion Glossary: new terms. Smith BJ, Tang KC, Nutbeam D. Health Promot Int. 2006 Dec;21(4):340-5.