extroversion

n. [ See Extrorse. ] 1. The condition of being turned wrong side out; as, extroversion of the bladder. Dunglison. [ 1913 Webster ]

2. (Psychol.) the trait of being interested primarily in things in one's external environement, rather than one's own thoughts and feelings. [ PJC ]

3. (Psychol.) the act of directing one's interests primarily toward things in one's external environement, rather than one's own thoughts and feelings. [ PJC ]