Definition of duly adverb from the Oxford Advanced American Dictionary

     

    duly

     adverb
    adverb
    NAmE//ˈduli//
     
     
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  1. 1(formal) in the correct or expected manner The document was duly signed by the inspector.
  2. 2 at the expected and correct time They duly arrived at 9:30 in spite of torrential rain. compare unduly
See the Oxford Advanced Learner's Dictionary entry: duly