health [AS, haelth] , a condition of physical, mental, and social well-being and the absence of disease or other abnormal condition. It is not a static condition. Constant change and adaptation to stress result in homeostasis. René Dubos, often quoted in nursing education, says, “The states of health or disease are the expressions of the success or failure experienced by the organism in its efforts to respond adaptively to environmental challenges.” See also high-level wellness, homeostasis.