815 ILCS 405/2.6
"Retail installment contract", "installment contract" or "contract" means an instrument or instruments, other than a retail charge agreement or an instrument reflecting a sale made pursuant thereto, entered into in this State and prescribing the terms of a retail installment transaction.
(from Ch. 121 1/2, par. 502.6)
(Source: Laws 1967, p. 2149.)