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 ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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