atheˈisticalness ? Obs. [f. as prec. + -ness.] The quality of being atheistic; godlessness. 1654Hammond Fundam.Wks. I. 500 (R.) Lord, purge..out of all hearts that profaneness and atheisticalness.1667H. More Div.Dial. iv. xv. (1713) 319 By reason of their Ignorance, Atheisticalness and Idolatry.