Source : Webster's Revised Unabridged Dictionary (1913)

Extraversion \Ex`tra*ver"sion\, n. [Pref. extra- + L. vertere,
   versum, to turn: cf. F. extraversion.]
   The act of throwing out; the state of being turned or thrown
   out. [Obs.] --Boyle.

Source : WordNet®

extraversion
     n : (psychology) an extroverted disposition; concern with what
         is outside the self [syn: {extroversion}] [ant: {introversion},
          {ambiversion}]