(1) “Dangerous weapon” or “weapon” means any dangerous instrument or substance that is capable of inflicting any injury on any person;

(2) “Drug” means any controlled substance, controlled substance analogue, marijuana, alcohol, legend drug or any other substance the possession or use of which is regulated in any manner by any governmental authority, including the school system;

(3) “Drug paraphernalia” means all equipment, products and materials of any kind that are used, intended for use or designed for use in planting, propagating, cultivating, growing, harvesting, manufacturing, compounding, converting, producing, processing, preparing, testing, analyzing, packaging, repackaging, storing, containing, concealing, injecting, ingesting, inhaling or otherwise introducing into the human body a drug, as defined in subdivision (2). An electronic pager in the possession of a student shall be included in this definition if used or intended for use as defined by this subdivision (3);

(4) “School” means all public schools that conduct classes in any grade from kindergarten through grade twelve (K-12);

(5) “School principal” or “principal” means the administrative head of a public school, by whatever title the person may be known;

(6) “School resource officer” means a law enforcement officer, as defined under § 39-11-106, who is in compliance with all laws, rules and regulations of the peace officers standards and training commission and who has been assigned to a school in accordance with a memorandum of understanding between the chief of the appropriate law enforcement agency and the LEA;

(7) “Student” means any person, regardless of age, enrolled in the public school; and

(8) “Visitor” means any person who is on school property, except for certificated personnel employed by the state or local board of education.