Illinois Statutes Chapter 50. Local Government § 415/1. Definitions

(a) “Unit of local government” means any county, city, village, incorporated town, township, school district, special district, and unit, designated as a unit of local government by law, which exercises limited governmental powers or powers in respect to limited governmental subjects.

(b) “Debt” means indebtedness incurred by a unit of local government through the issuance and sale of bonds, or through an equivalent manner of borrowing for which notes or other evidences of indebtedness are issued fixing the amount of principal and interest from time to time payable to retire the indebtedness.

(c) “Gross defeasance” means the deposit in escrow of cash or cash equivalents in an amount sufficient to pay all remaining principal and interest until maturity of any debt outstanding.

(d) “Net defeasance” means the deposit in escrow of moneys in an amount sufficient, when added to guaranteed interest earnings of such funds, to pay all remaining principal and interest until maturity of any debt outstanding.

(e) “Escrow” means a fiduciary account established with (i) any banking corporation which is both organized under the Illinois Banking Act,  1 as amended and authorized to accept and administer trusts in this State, or (ii) any national banking association which has its principal place of business in this State and which also is authorized to accept and administer trusts in this State.