Definition of undecidable
: not capable of being decided : not decidable < … a huge popular audience, most of whom must have been baffled and exasperated by its elaborate and undecidable mystifications. — David Lodge> < … deconstruction, which teaches that literature is essentially “undecidable,” beyond interpretation … — James Atlas> <To be complete such a system must be able to prove that any formula expressible in its language (a mathematical equation, for example, or a statement in symbolic logic) is either true or false; nothing can be undecidable. — George Johnson>
undecidabilityplay \ˌən-di-ˌsī-də-ˈbi-lə-tē\ noun
First Known Use of undecidable
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