Source : Webster's Revised Unabridged Dictionary (1913)

Disown \Dis*own"\, v. t. [imp. & p. p. {Disowned}; p. pr. & vb.
   n. {Disowning}.]
   1. To refuse to own or acknowledge as belonging to one's
      self; to disavow or deny, as connected with one's self
      personally; as, a parent can hardly disown his child; an
      author will sometimes disown his writings.

   2. To refuse to acknowledge or allow; to deny.

            Then they, who brother's better claim disown, Expel
            their parents, and usurp the throne.  --Dryden.

   Syn: To disavow; disclaim; deny; abnegate; renounce;
        disallow.

Source : WordNet®

disowning
     n : refusal to acknowledge as one's own [syn: {disownment}]