The definition of fallacious is something based on an erroneous or mistaken belief.adjective
When you make an argument based on a mistaken belief, this is an example of an argument that would be described as fallacious.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
- containing a fallacy; erroneous: fallacious reasoning
- misleading or deceptive
- causing disappointment; delusive
Origin: L fallaciosus
Used by arrangement with John Wiley & Sons, Inc.
- Containing or based on a fallacy: a fallacious assumption.
- Tending to mislead; deceptive: fallacious testimony.
- fal·laˈcious·ly adverb
- fal·laˈcious·ness noun