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]WordNet (r) 3.0 (2006):
revocable adj 1: capable of being revoked or annulled; "a revocable order" [syn: revocable, revokable] [ant: irrevocable, irrevokable]