Adverb
without official authorization
not in an official capacity
Source: WordNethe had made some money on the side Source: Internet
unofficially, he serves as the treasurer Source: Internet
AC-130s from both the 4th and 16th Special Operations Squadrons have been deployed in nearly every conflict the United States has been involved in, officially and unofficially, since the end of the Vietnam War. Source: Internet
Additionally, fans of the canceled might be aware that the original demo of the game,, was remade for PC and has a virtual reality option is already available to play in VR, albeit unofficially and only in the form of a small demo. Source: Internet
Acting unofficially, after a spate of accidents involving Allied personnel flying captured German aircraft resulted in official disapproval of such flights, Brown was determined to fly a powered Komet. Source: Internet
Although the whole mountain is a sacred place, “this way” refers to that particular unofficially not gazetted walk. Source: Internet