† disˈnull,v.Obs.rare. In 6 dys-. [f. dis- 5 + L. null-us none, null: cf. annul. A variant of denull, disannul.] trans. To bring to nothing, do away with, destroy. 1509Hawes Past. Pleas. viii. (1845) 31 To dysnull vyce and the vycious to blame.Ibid. xliv. 216 Dysnullynge the sectes of false idolatry.