Definition of decisively adverb from the Oxford Advanced Learner's Dictionary



    BrE BrE//dɪˈsaɪsɪvli//
    ; NAmE NAmE//dɪˈsaɪsɪvli//
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  1. 1in a way that is very important for the final result of a particular situation At Waterloo Napoleon was decisively defeated.
  2. 2in a way that shows the ability to decide quickly and with confidence Congress must act decisively against this threat. She shook her head decisively.