introversion

definition: (psychology) an introverted disposition
example:
speech part: noun
synonyms:
definition: the folding in of an outer layer so as to form a pocket in the surface
example:
speech part: noun
synonyms: intussusception invagination infolding
definition: the condition of being folded inward or sheathed
example:
speech part: noun
synonyms: invagination

How introversion is being used?