Word Study
inofficial
CIDE DICTIONARY
inofficial, 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."
Syn. -- Private; informal; unwarranted; unauthorizod; irregular; unceremonious; unprofessional.
For further exploring for "inofficial" in Webster Dictionary Online