The Collaborative International Dictionary of English v.0.48:
Preferable \Pref"er*a*ble\, a. [Cf. F. pr['e]f['e]rable.] Worthy to be preferred or chosen before something else; more desirable; as, a preferable scheme. --Addison. [1913 Webster]WordNet (r) 3.0 (2006):
preferable adj 1: more desirable than another; "coffee is preferable to tea"; "Danny's preferred name is `Dan'" [syn: preferable, preferred]