This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Open to argument: an arguable question, still unresolved.

adj. That can be argued plausibly; defensible in argument: three arguable points of law.

adj. That which can be argued; i.e., that which can be proven or strongly supported with sound logical deduction, precedent, and evidence.

adj. Open to doubt, argument or debate.

adj. Capable of being argued; admitting of debate.

Capable of being argued; admitting argument.

adj. open to argument or debate

adj. capable of being supported by argument

"Ordinary legal indeterminacy of this sort, a fact of the law, does not mean that every legal position one comes up with, while arguable, is viable or persuasive, or that every disagreement on a legal issue is reasonable."

controversial    plausible   

arguably   

questionable   

either/or    in-stride    forfeiture-by-wrongdoing    allochthonous    iffy    either-or    base/base    well-based    open-and-shut    undecidable