What is Bankable?

Legal Definition
In mercantile law. Notes, checks, bank-bills, drafts, and other securities for money, received as cash by the banks. Such commercial paper as is considered worthy of discount by the bank to which it is offered is termed "bankable." Allis Co. v. Power Co., 9 S. D. 459, 70 N. W. 650.
-- Black's Law Dictionary
Legal Definition
Negotiable paper which a bank will receive as cash. See Ann. Cas. 1913C, 1255.
-- Ballentine's Law Dictionary