Definition: lacking interest or significance or impact
Usage: an insipid personality; jejune novel
Main entry: puerile, adolescent, jejune, juvenile
Definition: displaying or suggesting a lack of maturity
Usage: adolescent insecurity; jejune responses to our problems; their behavior was juvenile; puerile jokes
Main entry: jejune, insubstantial
Definition: lacking in nutritive value
Usage: the jejune diets of the very poor