† legaˈtarian,a.Obs.rare—1. [f.med.L. lēgātāri-us (f.lēgātus legate) + -an.] Of or pertaining to a legate or deputy. 1766T. Amory J. Buncle (1770) IV. 83 Jesus Christ came with a legatarian power from God, the Supreme Being, to declare his will to mankind.