30 ILCS 500/1-15.30

"Contract" means all types of State agreements, regardless of what they may be called, for the procurement, use, or disposal of supplies, services, professional or artistic services, or construction or for leases of real property where the State is the lessee, or capital improvements, and including renewals, master contracts, contracts for financing through use of installment or lease-purchase arrangements, renegotiated contracts, amendments to contracts, and change orders.