Webster's 1913 Dictionary
ILLATIVE
Il "la *tive, a. Etym: [L. illativus: cf. F. illatif.]
Defn: 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.
ILLATIVE
ILLATIVE Il "la *tive, n.
Defn: An illative particle, as for, because.
ILLATIVELY
ILLATIVELY Il "la *tive *ly, adv.
Defn: By inference; as an illative; in an illative manner.
New American Oxford Dictionary
illative
il la tive |ˈilətiv, iˈlātiv ˈɪlədɪv | ▶adjective 1 of the nature of or stating an inference. • proceeding by inference. 2 Grammar relating to or denoting a case of nouns in some languages used to express motion into something. ▶noun the illative case, or a word in this case. DERIVATIVES il la tive ly adverb ORIGIN late 16th cent.: from Latin illativus, from illat- ‘brought in ’ (see illation ).
Oxford Dictionary
illative
illative |ɪˈleɪtɪv | ▶adjective 1 of the nature of or stating an inference. • proceeding by inference. 2 Grammar relating to or denoting a case of nouns in some languages used to express motion into something. ▶noun the illative case, or a word in this case. DERIVATIVES illatively adverb ORIGIN late 16th cent.: from Latin illativus, from illat- ‘brought in ’ (see illation ).
The Wordsmith Dictionary