re·voke /ri-'vōk/ vt re·voked, re·vok·ing: to annul by recalling or taking back: as
a: to destroy the effectiveness of (a will) by executing another or by an act of destruction (as tearing or crossing out)
b: to put an end to (a trust)
c: to withdraw (an offer) esp. before acceptance
d: to withdraw (acceptance of goods) by refusing to keep goods because of nonconformity see also rejection
e: to take back (as a license or a grant of parole or probation) esp. because of misconduct
re·vok·er n
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.