This paper reviews the literature related to wellness. Wellness is reviewed in terms of definitions, theoretical perspectives, and research approaches. The definitions of wellness by six theorists are outlined. Regardless of definition chosen, today's conception of wellness has been fostered by disillusion with traditional medicine and the growing self-care movement. Recent interest in a holistic approach to life supports concerns with wellness and wellness readiness. Both qualitative and quantitative measures of wellness can be found in the literature, and both research approaches tend to focus on the wellness activities of employees and students, especially college students. Wellness centers and associated facilities are becoming more common on college and university campuses. (Contains 92 references.) (SLD)