Source : Webster's Revised Unabridged Dictionary (1913)

Jejune \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.

Source : WordNet®

jejune
     adj 1: lacking in nutritive value; "the jejune diets of the very
            poor" [syn: {insubstantial}]
     2: displaying or suggesting a lack of maturity; "adolescent
        insecurity"; "jejune responses to our problems"; "their
        behavior was juvenile"; "puerile jokes" [syn: {adolescent},
         {juvenile}, {puerile}]
     3: lacking interest or significance; "an insipid personality";
        "jejune novel" [syn: {insipid}]