untruePronunciation: /ʌnˈtruː/Translate untrue | into French | into German | into Italian | into Spanish Definition of untrue adjective 1not in accordance with fact or reality; false or incorrect:these suggestions are totally untrue a malicious and untrue story 2not faithful or loyal: a despotic sheik can be untrue to his vast seraglio 3incorrectly positioned or balanced; not upright or level. Derivatives untruly adverb Origin: Old English untrēowe 'unfaithful' (see un-1, true)untrue in other Oxford dictionaries Definition of untrue in the US English dictionary