1. the position that certain phenomena are best understood and explained in terms of their purposes rather than their causes. In psychology, its proponents hold that mental processes are purposive, that is, directed toward a goal. The view that behavior is to be explained in terms of ends and purposes is frequently contrasted with explanations in terms of causes, such as instincts and conditioned responses. See also hormic psychology; purposive psychology.

2. the concept that the universe or human history or both have purpose and direction and are moving toward a particular goal. This position is usually, but not exclusively, a religious one. —teleologic or teleological adj.