What does the word fallacy mean?

Usage examples for fallacy

  1. I have been so long accustomed to the fallacy of pratique reports, that I do not give entire credit to this. – Memoirs and Correspondence of Admiral Lord de Saumarez, Vol. I by Sir John Ross
  2. The root fallacy in Paley's argument consisted in reasoning from a particular to an universal. – A Candid Examination of Theism by George John Romanes
  3. But no man understood better than he did the fallacy of the argument that modern abolitionists had put back the cause of emancipation in the South. – Isaac T. Hopper by L. Maria Child