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



    BrE BrE//ˈtruːθfəli//
    ; NAmE NAmE//ˈtruːθfəli//
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  1. 1in an honest way; by saying what is true synonym honestly (1) She answered all their questions truthfully.
  2. 2used to emphasize that what you are saying is true, however surprising it may seem synonym honestly (2) I can truthfully say that I have never seen anything quite like it before.
  3. Word Familytrue adjective (untrue)truth nountruthful adjective (untruthful)truthfully adverbtruly adverb