Concern with or an orientation toward others or what is outside oneself; behavior expressing such an orientation; the definitive characteristic of an extrovert
In a genre characterized by brassy extroversion, The Dead is a quiet revolutionary: a musical that dares to be diffident.
The quality of being comfortable with relationships; the opposite extreme, introversion, is characterized by more social discomfort (3)
{i} outgoing disposition, tendency to direct one's interest and concern outward (Psychology)