1. Not interesting; dull: "and there pour forth jejune words and useless empty phrases" (Anthony Trollope).
2. Lacking maturity; childish: surprised by their jejune responses to our problems.
3. Lacking in nutrition: a jejune diet.
[From Latin iēiūnus, meager, dry, fasting.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.