D defs.my
Entry 1 sense Webster, 1913

Introversion

· In·tro·ver·sion · IPA /ɪntɹəˈvəɹʒən/
01 n. The act of introverting, or the state of being introverted; the act of turning the mind inward.
  1. 1.
    The act of introverting, or the state of being introverted; the act of turning the mind inward.