Il"la*tive (?), a. [L. illativus: cf. F. illatif.]
Relating to, dependent on, or denoting, illation; inferential; conclusive; as, an illative consequence or proposition; an illative word, as then, therefore, etc.
Illative conversion Logic, a converse or reverse statement of a proposition which in that form must be true because the original proposition is true. -- Illative sense Metaph., the faculty of the mind by which it apprehends the conditions and determines upon the correctness of inferences.
© Webster 1913.
Il"la*tive, n.
An illative particle, as for, because.
© Webster 1913.