740 ILCS 174/5
As used in this Act:
"Employer" means: an individual, sole proprietorship, partnership, firm, corporation, association, and any other entity that has one or more employees in this State, including a political subdivision of the State; a unit of local government; a school district, combination of school districts, or governing body of a joint agreement of any type formed by two or more school districts; a community college district, State college or university, or any State agency whose major function is providing educational services; any authority including a department, division, bureau, board, commission, or other agency of these entities; and any person acting within the scope of his or her authority express or implied on behalf of those entities in dealing with its employees.
"Employee" means any individual who is employed on a full-time, part-time, or contractual basis by an employer. "Employee" also includes, but is not limited to, a licensed physician who practices his or her profession, in whole or in part, at a hospital, nursing home, clinic, or any medical facility that is a health care facility funded, in whole or in part, by the State.
740 ILCS 174/5