falsity

1 a false idea or belief a papal letter condemning secularism and other movements that the church considered to be falsities of the modern age Synonyms delusion, error, falsehood, fallacy, hallucination, illusion, misbelief, misconception, myth, old wives' tale, untruthRelated 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 when questioned by his parents about his drug use, the teenager told one blatant falsity after another Synonyms fable, fabrication, fairy tale, falsehood, lie, fib, mendacity, prevarication, story, tale, taradiddle (or tarradiddle), untruth, 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 lack of faithfulness especially to one's husband or wife the falsity of Guinevere usually figures prominently in medieval and modern tellings of the legend of King Arthur Synonyms disloyalty, faithlessness, falseness, infidelity, inconstancy, perfidiousness, perfidy, unfaithfulnessRelated Words adultery; betrayal, double-cross, double-dealing, duplicity, sellout, treachery, treason; deceit, deception, lyingNear Antonyms staunchness, steadfastness; dependability, reliability; honesty, trustworthinessAntonyms allegiance, constancy, devotedness, devotion, faith, faithfulness, fealty, fidelity, loyalty

4 the act or fact of violating the trust or confidence of another despite being offered a fortune to spill the president's secrets, the trusted aide declared that he'd sooner die than be guilty of such falsity Synonyms backstabbing, business, disloyalty, double cross, faithlessness, falseness, betrayal, infidelity, perfidy, sellout, treachery, treason, two-timing, unfaithfulnessRelated Words abandonment, desertion; deceit, deception, double-dealing, duplicity, guile, two-facedness; fraud, informing, lying, snitching, talebearing, trickeryNear Antonyms dependability, reliability, trustworthiness; defense, protection, safeguard, shieldAntonyms allegiance, devotion, faithfulness, fealty, fidelity, loyalty, staunchness, steadfastness

5 the quality or state of being false the falsity of Columbus's estimate of the earth's circumference was pretty much demonstrated when he made a head-on collision with the western hemisphere Synonyms erroneousness, fallaciousness, falsehood, falseness, fallacy, untruthRelated 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