1Of the nature of or characterized by discourse, discussion, or argument. Now somewhat rare.
2rare That passes from one subject to another; of the nature of a digression; discursive.
Early 17th century; earliest use found in Joseph Hall (1574–1656), bishop of Norwich, religious writer, and satirist. From post-classical Latin discursorius inferred by rational discourse from classical Latin discurs-, past participial stem of discurrere + -ōrius.