fallacious Meaning, Definition & Usage

  1. adjective satellite containing or based on a fallacy
    unsound.
    • fallacious reasoning
    • an unsound argument
  2. adjective satellite intended to deceive
    fraudulent; deceitful.
    • deceitful advertising
    • fallacious testimony
    • smooth, shining, and deceitful as thin ice" - S.T.Coleridge
    • a fraudulent scheme to escape paying taxes
  3. adjective satellite based on an incorrect or misleading notion or information
    • fallacious hope

WordNet

Fal*la"cious adjective
Etymology
L. fallaciosus, fr. fallacia: cf. F. fallacieux. See Fallacy.
Definitions
  1. Embodying or pertaining to a fallacy; illogical; fitted to deceive; misleading; delusive; as, fallacious arguments or reasoning. -- Fal*la"cious*ly, adv. -Fal*la"cious*ness, n.

Webster 1913