fallacious

fal·la·cious

adjective \fə-ˈlā-shəs\

Definition of FALLACIOUS

1

: embodying a fallacy <a fallacious conclusion>

2

: tending to deceive or mislead : delusive

— fal·la·cious·ly adverb

— fal·la·cious·ness noun

Examples of FALLACIOUS

1. <it's fallacious to say that something must exist because science hasn't proven its nonexistence>
2. <consumers who harbor the fallacious belief that credit-card spending will never catch up with them>

First Known Use of FALLACIOUS

1509

Related to FALLACIOUS

Synonyms

illogical, illegitimate, inconsequent, inconsequential, invalid, irrational, nonrational, unreasonable, unreasoning, unsound, weak

Antonyms

logical, rational, reasonable, sound, valid, well-founded, well-grounded

Related Words

eristic (also eristical), misleading, sophistic (or sophistical), specious; half-baked, ill-advised, misguided, unconsidered, unreasoned; inconsistent; absurd, asinine, foolish, meaningless, nonsensical, preposterous, reasonless, senseless, silly; Kafkaesque, odd, peculiar, strange, surreal, unusual, weird; insane, mad, nutty, wacky (also whacky); disordered, disorganized, rambling, random; unconvincing; inexplicable, unaccountable, unexplainable

Near Antonyms

commonsense, sane, sensible, sober, wise; enlightened, informed, just, justified, reasoned; ordered, organized; clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid; certain, sure, true; confirmed, corroborated, demonstrated, established, substantiated, validated

Other Logic Terms

a posteriori, connotation, corollary, inference, mutually exclusive, paradox, postulate, syllogism

Rhymes with FALLACIOUS

audacious, bodacious, capacious, cetaceous, crustaceous, curvaceous, drupaceous, edacious, flirtatious, fugacious, hellacious, herbaceous, loquacious, mendacious, micaceous, pomaceous, predaceous, pugnacious, rapacious, rosaceous, sagacious, salacious, sebaceous, sequacious, setaceous, tenacious, testaceous, tufaceous, ungracious, veracious, vinaceous, voracious