Source : Webster's Revised Unabridged Dictionary (1913)

Conclusively \Con*clu"sive*ly\, adv.
   In the way of conclusion; decisively; positively. --Burke.

Source : WordNet®

conclusively
     adv : in a conclusive way; "we settled the problem conclusively"
           [syn: {once and for all}] [ant: {inconclusively}]