fallacious

[ fuh-ley-shuhs ]
See synonyms for: fallaciousfallaciousness on Thesaurus.com

adjective
  1. containing a fallacy; logically unsound: fallacious arguments.

  2. deceptive; misleading: fallacious testimony.

  1. disappointing; delusive: a fallacious peace.

Origin of fallacious

1
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, adverb
  • fal·la·cious·ness, noun
  • non·fal·la·cious, adjective
  • non·fal·la·cious·ly, adverb
  • non·fal·la·cious·ness, noun
  • un·fal·la·cious, adjective
  • un·fal·la·cious·ly, adverb

Words Nearby fallacious

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use fallacious in a sentence

British Dictionary definitions for fallacious

fallacious

/ (fəˈleɪʃəs) /


adjective
  1. containing or involving a fallacy; illogical; erroneous

  2. tending to mislead

  1. delusive or disappointing: a fallacious hope

Derived forms of fallacious

  • fallaciously, adverb
  • fallaciousness, 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