proˈbationatory,a.Obs.rare—1. [f. as prec. + -atory, as in accus-atory, etc.] Connected with trial or investigation. 1677Gale Crt. Gentiles II. iii. 17 The λόγος πειραστικὸς, the probationatory, or problematic disputes in the old Acadamie begun by Socrates and Plato.