English to English

adverb (r)

• without question and beyond doubt(adv.all)

  Example:
  It was decidedly too expensive.
  

  Synonym:
  by all odds, definitely, emphatically, in spades, unquestionably
  

  source: wordnet30
• In a decided manner; indisputably; clearly; thoroughly.(adverb)

  source: webster1913