"Mental institution" means any hospital, institution, clinic, evaluation facility, mental health center, or part thereof, which is used primarily for the care or treatment of persons with mental illness.
"Patient in a mental institution" means the person was admitted, either voluntarily or involuntarily, to a mental institution for mental health treatment, unless the treatment was voluntary and solely for an alcohol abuse disorder and no other secondary substance abuse disorder or mental illness.
A person "engaged in the business" means a person who devotes time, attention, and labor to engaging in the activity as a regular course of trade or business with the principal objective of livelihood and profit, but does not include a person who makes occasional repairs of firearms or who occasionally fits special barrels, stocks, or trigger mechanisms to firearms.
"With the principal objective of livelihood and profit" means that the intent underlying the sale or disposition of firearms is predominantly one of obtaining livelihood and pecuniary gain, as opposed to other intents, such as improving or liquidating a personal firearms collection; however, proof of profit shall not be required as to a person who engages in the regular and repetitive purchase and disposition of firearms for criminal purposes or terrorism.
"School" means a public or private elementary or secondary school, community college, college, or university.
"School related activity" means any sporting, social, academic, or other activity for which students' attendance or participation is sponsored, organized, or funded in whole or in part by a school or school district.
720 ILCS 5/24-3