[f. as prec. + -NESS.] The quality of being erroneous.
1624. A. Wotton, Runne from Rome, 68. I haue alreadie discouered and proued the erroneousnesse of the faith of that Church.
1748. Hartley, Observ. Man, I. iii. 391. The Erroneousness of the Judgment in Children and Idiots.
1818. Hallam, Mid. Ages (1872), III. 299. The erroneousness of this religion.
1854. Toulm. Smith, Parish (1857), 11. I shall show the erroneousness of the notion.