[1] : The Collaborative International Dictionary of English v.0.48

officially \offi"cially\, adv.
   by the proper officer; by virtue of the proper authority; in
   pursuance of the special powers vested in an officer or
   office; as, accounts or reports officially verified or
   rendered; letters officially communicated; persons officially
   notified.
   1913 webster

[2] : WordNet (r) 2.0

officially
     adv 1: in an official role; "officially, he is in charge";
            "officially responsible" ant: unofficially
     2: with official authorization; "the club will be formally
        recognized" syn: formally
see also:
unofficially formally 

Officially >> O Words
Officially, definition of term: Officially
officially_pag1.html