† oˈstentatory,a.Obs.rare—1. [ad. L. ostentātōri-us, f.ostentātor: see -ory. In OF.ostentatoire (16th c. in Godef.).] = ostentatious. 1657G. Starkey Helmont's Vind. To Rdr., 'Tis no unlikely but some captious Antagonist may censure my Aphorisms as ostentatory.