"Person with a cognitive impairment" means a person with a significant impairment of cognition or memory that represents a marked deterioration from a previous level of function. Cognitive impairment includes, but is not limited to, dementia, amnesia, delirium, or a traumatic brain injury.
"Person with a developmental disability" means a person with a disability that is attributable to (1) an intellectual disability, cerebral palsy, epilepsy, or autism, or (2) any other condition that results in an impairment similar to that caused by an intellectual disability and requires services similar to those required by a person with an intellectual disability.
"Person with an intellectual disability" means a person with significantly subaverage general intellectual functioning which exists concurrently with an impairment in adaptive behavior.
725 ILCS 5/115-10