1. The quality of being vapid and unsophisticated
   "The jejuneness of the conversation at the party disappointed her";
   - jejunity, tameness, vapidity, vapidness
    
2. Lacking and evidencing lack of experience of life
   "His jejuneness in business matters led to several poor investment decisions";
   - callowness, juvenility
    
3. Quality of inadequate nutritive value
   "The jejuneness of the soil made it difficult to grow crops";
   - jejunity

Type of: dullness, immatureness, immaturity, inadequacy, inadequateness, monotonousness