Definition of fallacious
fallaciously
adverbfallaciousness
nounExplore M-W
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Examples of fallacious in a Sentence
it's fallacious to say that something must exist because science hasn't proven its nonexistence
consumers who harbor the fallacious belief that credit-card spending will never catch up with them
Did You Know?
Oh what a tangled web we weave / When first we practise to deceive! So wrote Sir Walter Scott in his 1808 poem Marmion. Scott’s line wasn't written with etymology in mind, but it might be applied to the history of "fallacious." That word traces back to the Latin verb fallere ("to deceive"), but it passed through a tangle of Latin and French forms before it eventually made its way into English in the early 1500s. Other descendants of "fallere" in English include "fail," "false," and "fault."
1509
First Known Use of fallacious
1509
Other Logic Terms
FALLACIOUS Defined for English Language Learners
fallacious
playDefinition of fallacious for English Language Learners
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: containing a mistake : not true or accurate
Learn More about fallacious
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See words that rhyme with fallacious Thesaurus: All synonyms and antonyms for fallacious Spanish Central: Translation of fallacious Nglish: Translation of fallacious for Spanish speakers Britannica English: Translation of fallacious for Arabic speakers
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