The term 'unauthorised' is used to describe activities or items that are not officially sanctioned or approved. This can include things that are ILLICIT, ILLEGAL, unoffical, or BANNED. ILLICIT means something that is not allowed by law or accepted by society, while unoffical means something that is not officially recognized or approved. ILLEGAL means something that is against the law, and BANNED means something that is prohibited or forbidden. All of these terms refer to activities or items that are not authorised.