Definitions
1.nounA doctrine, in several fields, that the function of something should be reflected in its design and the materials used in its construction
2.nounThe definition of mental states in terms of their causes and effects
3.nounThe idea that social and cultural cohesion are a function of the interdependence and interactions of the institutions of a society
4.nounA general school of thought that considers psychological phenomena in terms of their role in adaptation to the person's environment