Source : Webster's Revised Unabridged Dictionary (1913)

Inofficial \In"of*fi"cial\, a.
   Not official; not having official sanction or authoriy; not
   according to the forms or ceremony of official business; as,
   inofficial intelligence.

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

   Syn: Private; informal; unwarranted; unauthorizod; irregular;
        unceremonious; unprofessional.