Not having enough food to nourish the body, or not having enough food to relieve hunger.

Giving evidence of lacking experience or information.

Immature, juvenile.

Websters definitions are also still in use.

Je*june" (?), a. [L. jejunus fasting, hungry, dry, barren, scanty; of unknown origin.]

1.

Lacking matter; empty; void of substance.

2.

Void of interest; barren; meager; dry; as, a jejune narrative.

- Je*june"ly, adv. -- Je*june"ness, n.

Bacon.

© Webster 1913.