For the purposes of this title the following words and phrases shall have the following meanings ascribed to them respectively.
ACT.
Includes a failure or omission to take action.
(ILCS Ch. 720, Act 5, § 2-2)
ANOTHER.
A person or persons other than the offender.
(ILCS Ch. 720, Act 5, § 2-3)
CONDUCT.
An act or a series of acts, and the accompanying mental state.
(ILCS Ch. 720, Act 5, § 2-4)
OFFENSE.
A violation of any penal statute of this city or state.
(ILCS Ch. 720, Act 5, § 2-12)