revocable

from WordNet (r) 3.0 (2006)

revocable
    adj 1: capable of being revoked or annulled; "a revocable order"
           [syn: {revocable}, {revokable}] [ant: {irrevocable},
           {irrevokable}]

from The Collaborative International Dictionary of English v.0.48

Revocable \Rev"o*ca*ble\, a. [L. revocabilis: cf. F.
   r['e]vocable. See {Revoke}.]
   Capable of being revoked; as, a revocable edict or grant; a
   revocable covenant.
   [1913 Webster] -- {Rev"o*ca*ble*ness}, n. -- {Rev"o*ca*bly},
   adv.
   [1913 Webster]