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]

WordNet (r) 3.0 (2006):

disbar
    v 1: remove from the bar; expel from the practice of law by
         official action; "The corrupt lawyer was disbarred"

Moby Thesaurus II by Grady Ward, 1.0:

62 Moby Thesaurus words for "disbar":
   boot, bounce, break, bump, bust, can, cashier, deconsecrate,
   defrock, degrade, demote, deplume, depose, deprive, dethrone,
   discharge, discrown, disemploy, disenthrone, dismiss, displace,
   displume, drum out, excommunicate, expel, fire, furlough,
   give the ax, give the gate, kick, kick upstairs, lay off, let go,
   let out, liquidate, make redundant, oust, overthrow, pension,
   pension off, purge, read out of, release, remove,
   remove from office, replace, retire, sack, separate forcibly,
   strip, strip of office, strip of rank, superannuate, surplus,
   suspend, turn off, turn out, unchurch, unfrock, unsaddle, unseat,
   unthrone