Public health definition
Full Definition of PUBLIC HEALTH. : the art and science dealing with the protection and improvement of community health by organized community effort and including preventive medicine and sanitary and social science.See public health defined for English-language learners.ADVERTISEMENT.ull Definition of PUBLIC HEALTH. : the art and science dealing with the protection and improvement of community health by organized community effort and including preventive medicine and sanitary and social science. See public health defined for English-language learners. ADVERTISEMENT.