il·la·tive (ĭlə-tĭv, ĭ-lā-)
1. Of, relating to, or of the nature of an illation.
2. Expressing or preceding an inference. Used of a word.
3. Grammar Of, relating to, or being a grammatical case indicating motion toward or into in some languages, as in Finnish Helsinkiin, "to Helsinki."
1. A word or phrase, such as hence or for that reason, that expresses an inference.
2. See illation.
a. The illative case.
b. A word or form in the illative case.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.