What does BANK-BILL mean? July 20, 2017 All Dictionary BANK-BILL meaning in Law Dictionary promissory note given by a bank, payable into bearer on demand, and built to flow as cash. Townsend v. Men And Women, 4 HI. 32S; Low v. People, 2 Park. Cr. R. (N. Y.) 37: condition v. Hays, 21 Ind. 176; State v. Wilkins, 17 Vt 155.