Definition of untrue adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ʌnˈtruː//
    ; NAmE NAmE//ʌnˈtruː//
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  1. 1not true; not based on facts These accusations are totally untrue. an untrue claim It is untrue to say that something like this could never happen again.
  2. 2untrue (to somebody/something) (formal) not loyal to somebody/something synonym unfaithful If he agreed to their demands, he would have to be untrue to his own principles. opposite true
  3. Word Familytrue adjective (untrue)truth nountruthful adjective (untruthful)truthfully adverbtruly adverb Word Origin Old English untrēowe ‘unfaithful’ (see un-, true).
See the Oxford Advanced American Dictionary entry: untrue