1. the quality of being lacking in substance, interest, or significance; emptiness or barrenness
Usage: formal
2. the quality of being immature or childish; lack of experience or sophistication
Usage: formal

Examples

• The jejuneness of his argument became apparent when challenged by experts.
• Critics noted the jejuneness of the novel’s plot and character development.
• Her jejuneness in business matters led to several costly mistakes.
• The jejuneness of the presentation disappointed the academic audience.
• Despite his education, there was a certain jejuneness to his worldview.
• The jejuneness of the debate left viewers wanting more substantial discussion.