noun. 1. with regard to Jung's analytic psychology, a kind of thought or emotion which is reliant upon instant tangible senses and demonstrates little, if any, understanding for abstract thought. In some classic cultures, this kind of thinking might turn itself into fetishism and a belief in mythical things. Today, it might demonstrate itself as an incapacity to think outside the box. 3. with regard to Piaget's theory, reference: concrete operational stage.