fallacious

[ fuh-ley-shuhs ]

/ fəˈleɪ ʃəs /

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See synonyms for: fallacious / fallaciousness on Thesaurus.com

adjective

containing a fallacy; logically unsound: fallacious arguments.

deceptive; misleading: fallacious testimony.

disappointing; delusive: a fallacious peace.

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Origin of fallacious

First recorded in 1500–10, fallacious is from the Latin word fallāciōsus deceitful, deceptive. See fallacy, -ous

OTHER WORDS FROM fallacious

fal·la·cious·ly, adverbfal·la·cious·ness, nounnon·fal·la·cious, adjectivenon·fal·la·cious·ly, adverb

non·fal·la·cious·ness, nounun·fal·la·cious, adjectiveun·fal·la·cious·ly, adverb

Words nearby fallacious

Falkland Islands Dependencies, Falkner, fall, fal la, fall about, fallacious, fallacy, fallacy of composition, fallacy of division, fallacy of many questions, fallal

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use fallacious in a sentence

But such disparagement was itself a kneejerk reaction, and it was fallacious.
The Cult of Royal Porn|Tim Teeman|April 26, 2014|DAILY BEAST
Some care, however, is necessary in applying this test, as in the hands of inexperienced persons it is sometimes fallacious.
Elements of Agricultural Chemistry|Thomas Anderson
She evidently made up her mind that logic was a fallacious mode of inference, and determined to abandon it for the future.
The Daughters of Danaus|Mona Caird
It appears to me that the fallacious reasoner, in his private thoughts, would not be likely to proceed beyond the first step.
A System of Logic: Ratiocinative and Inductive|John Stuart Mill

The fallacious assumption implied in the query, quid Christianis cum regibus?
The Cradle of Mankind|W.A. Wigram
But it would appear that even the Colonel's theory was fallacious.
Mrs. Skaggs's Husbands and Other Stories|Bret Harte

British Dictionary definitions for fallacious

fallacious

/ (fəˈleɪʃəs) /

adjective

containing or involving a fallacy; illogical; erroneous

tending to mislead

delusive or disappointinga fallacious hope

Derived forms of fallacious

fallaciously, adverbfallaciousness, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

fallacious

Origin of fallacious

OTHER WORDS FROM fallacious

Words nearby fallacious

Words related to fallacious

How to use fallacious in a sentence

British Dictionary definitions for fallacious

Derived forms of fallacious