A doctrine, in several fields, that the function of something should be reflected in its design and the materials used in its construction.
Synonym of functional linguistics
The idea that social and cultural cohesion are a function of the interdependence and interactions of the institutions of a society.
A general school of thought that considers psychological phenomena in terms of their role in adaptation to the person's environment.
The definition of mental states in terms of their causes and effects.
The practical aspect of something.
The state of being practical or feasible.