/
ˈfaləsi/
n.
(pl. fallacies)
- a mistaken belief.
- Logic a failure in reasoning which renders an argument invalid.
Derivative
- fallacious adj.
- fallaciously adv.
- fallaciousness
/fəˈleɪʃəsnɪs/
n.
Etymology
C15 (in the sense ‘deception, guile’): from L. fallacia, from fallax, fallac- ‘deceiving’.
