The Collaborative International Dictionary of English v.0.48:

Disbar \Dis*bar"\, v. t. [imp. & p. p. Disbarred; p. pr. & vb.
   n. Disbarring.] (Law)
   To expel from the bar, or the legal profession; to deprive
   (an attorney, barrister, or counselor) of his status and
   privileges as such. --Abbott.
   [1913 Webster]