The World Health Organization definition of health has been used, unchanged, since 1948:
Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.
4. Preamble to the Constitution of the World Health Organization as adopted by the International Health Conference, New York, 19 June - 22 July 1946; signed on 22 July 1946 by the representatives of 61 States (Official Records of the World Health Organization, no. 2, p. 100) and entered into force on 7 April 1948. The definition has not been amended since 1948. tp://www.who.int/suggestions/faq/en/ accessed November 30, 2005