WordNet sense 1 ((Roman Catholic Church) the bishop of Caesarea who defended the Roman Catholic Church against the heresies of the 4th century; a saint and Doctor of the Church (329-379)):

Basil of Caesarea, Basil the Great, St. Basil, St. Basil the Great

WordNet sense 2 (leaves of the common basil; used fresh or dried):

sweet basil