displaying or suggesting a lack of maturity; "adolescent insecurity"; "jejune responses to our problems"; "their behavior was juvenile"; "puerile jokes"
disapproval If you describe someone or something as puerile, you mean that they are silly and childish. Concert organisers branded the group's actions as puerile puerile, schoolboy humour. silly and stupid = childish (puéril, from puerilis, from puer )