avouched,ppl.a.|əˈvaʊtʃt| [f. avouch v. + -ed.] Vouched for; acknowledged, avowed. 1637Gillespie Eng.-Pop. Cerem.Ep. A iv, Professed Papists and avouched Atheists.1846Grote Greece i. xiii. (1862) I. 207 Matter of fact generally unquestionable, though little avouched as to details.