debatable [dɪˈbeɪtəbəɫ]adjective 2noun 1forms 3 adjective2 •Open to debate; not fully proved or confirmed.Those data are debatable: no one has been able to replicate them.It's debatable whether he is the best candidate for the position. •Able to be debated; up for discussion.The lack of bonuses this year is not debatable. noun1 •A topic that is open to debate.Just how many glaucoma patients there are in the United States and just how prevalent is the disease are two unknowns or at least two debatables. — 1988 formsdebatables · more debatable · most debatable