n. The science of the phenomena of mind; mental science.n. The special psychology of any single group of living things: a common term for folk psychology, professional psychology, race psychology, ethnic psychology, psychology of peoples, etc.n. The science of the products of the mental life in the human race at large; same as folk psychology .n. The psychology and psychogenesis of the human mind.n. Race psychology; the differential psychology of species and races, whether human or sub-human.n. The science of the individual mind as conditioned, in its functions and development, by other minds; the psychology of the social factor in its influence upon the individual mind.