Adjective

(*comparative* more decidable, *superlative* most decidable)

- capable of being decided.
- (computer science) describing a set for which there exists an algorithm that will determine whether any element is or is not within the set in a finite amount of time.
*It is easy to show that the set of even numbers is decidable by creating the relevant Turing machine.*

- (logic) in intuitionistic logic, a proposition
*P*is decidable in a given theory if it can be proven from the theory that "either*P*or not*P*", i.e. in symbols: .^{ }