Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

preferable
     adj : more desirable than another; "coffee is preferable to tea";
           "Danny's preferred name is `Dan'" [syn: {preferred}]