untruth

1 a false idea or belief their argument rests on a fundamental untruth which has long been discredited Synonyms delusion, error, falsehood, falsity, hallucination, illusion, misbelief, misconception, myth, old wives' tale, fallacyRelated Words factoid; superstition; fiction, pretense (or pretence); distortion, inaccuracy, misapprehension, miscomprehension, misinterpretation, misjudgment, misperception, misunderstanding; misinformation, misknowledge, misreport, misrepresentation, misstatement; sophism, sophistry; fib, half-truth, lie, story, taleAntonyms truth, verity

2 a statement known by its maker to be untrue and made in order to deceive the Web site is rife with untruths and misleading information Synonyms fable, fabrication, fairy tale, falsehood, falsity, fib, mendacity, prevarication, story, tale, taradiddle (or tarradiddle), lie, whopperRelated Words distortion, exaggeration, half-truth; ambiguity, equivocation, obliquity; defamation, libel, slander; perjury; bluff, fiction, pose, pretense (or pretence); humbug, jive, nonsense; canard, fallacy, misconception, myth; falsification, misinformation, misreport, misrepresentation, misstatement; deceit, deceitfulness, dishonesty, duplicity, fraudulenceNear Antonyms fact, truism, verity; honesty, truthfulness, veracity; authentication, confirmation, substantiation, validation, verificationAntonyms truth

3 the quality or state of being false there is an element of untruth in all forms of art: works of art provide only a semblance of reality Synonyms erroneousness, fallaciousness, falsehood, falseness, falsity, fallacyRelated Words speciousness, spuriousness; deception, deceptiveness, delusion; inaccuracy, incorrectness; dishonesty, mendaciousness, mendacity, untruthfulnessNear Antonyms accuracy, actuality, correctness, factuality, factualness, genuineness; credibility, honesty, trustworthiness, truthfulness, veracityAntonyms truth, verity