a. Not official; not having official sanction or authority; unofficial; not according to the forms or ceremony of official business; as, inofficial intelligence. [ 1913 Webster ]

Pinckney and Marshall would not make inofficial visits to discuss official business. Pickering.

Syn. -- Private; informal; unwarranted; unauthorizod; irregular; unceremonious; unprofessional. [ 1913 Webster ]

adv. Without the usual forms, or not in the official character; unofficially. [ 1913 Webster ]