Meaning of DECIDABLE in English
— decidability , n.
/di suy"deuh beuhl/ , adj.
1. capable of being decided.
2. Logic. (of an axiom, proposition, etc.) having the property that its consistency or inconsistency with the axioms of a given logical system is determinable.
[ 1585-95; DECIDE + -ABLE ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012