extraversion

/ˌɛkstrəˈvɜrʒən/
noun
  1. The quality of being outgoing, sociable, and interested in interacting with others.
    • Her extraversion made her a natural leader in group projects.
    • Psychologists often measure extraversion as a key personality trait.
    • His extraversion helped him make friends quickly at the new school.
Antonyms
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