Relating to, dependent on, or denoting, illation; inferential; conclusive; as, an illative consequence or proposition; an illative word, as then, therefore, etc.
(Science: logic) illative conversion, a converse or reverse statement of a proposition which in that form must be true because the original proposition is true.
(Science: psychology) illative sense, the faculty of the mind by which it apprehends the conditions and determines upon the correctness of inferences.
Origin: L. Illativus: cf. F. Illatif.