The Collaborative International Dictionary of English v.0.48:
Controllable \Con*trol"la*ble\, a. Capable of being controlled, checked, or restrained; amenable to command. [1913 Webster] Passion is the drunkeness of the mind, and, therefore, . . . not always controllable by reason. --South. [1913 Webster]WordNet (r) 3.0 (2006):
controllable adj 1: capable of being controlled [syn: controllable, governable]