Source : Webster's Revised Unabridged Dictionary (1913)

Debatable \De*bat"a*ble\, a. [Cf. OF. debatable. See {Debate}.]
   Liable to be debated; disputable; subject to controversy or
   contention; open to question or dispute; as, a debatable
   question.

   {The Debatable Land} or {Ground}, a tract of land between the
      Esk and the Sark, claimed by both England and Scotland;
      the Batable Ground.

Source : WordNet®

debatable
     adj 1: open to doubt or debate; "If you ever get married, which
            seems to be extremely problematic" [syn: {problematic},
             {problematical}]
     2: open to argument or debate; "that is a moot question" [syn:
        {arguable}, {disputable}, {moot}]
     3: capable of being disproved [syn: {disputable}]