The Collaborative International Dictionary of English v.0.48:
Decidedly \De*cid"ed*ly\, adv. In a decided manner; indisputably; clearly; thoroughly. [1913 Webster]WordNet (r) 3.0 (2006):
decidedly adv 1: without question and beyond doubt; "it was decidedly too expensive"; "she told him off in spades"; "by all odds they should win" [syn: decidedly, unquestionably, emphatically, definitely, in spades, by all odds]