ˈrusticnessrare. [f. rustic a. + -ness.] Rustic quality; rusticity. 1684tr.Agrippa's Van. Arts iii. 20 Lucilius is damn'd for the rustickness of his hobling Verse.1838Carlyle Lect.Hist.Lit. (1892) 145 There is in him [Knox] a genuine, natural rusticness—a decided earnestness of purpose.