childish Meaning, Definition & Usage

  1. adjective satellite indicating a lack of maturity
    infantile.
    • childish tantrums
    • infantile behavior

WordNet

Child"ish adjective
Definitions
  1. Of, pertaining to, befitting, or resembling, a child. "Childish innocence." Macaulay.
  2. Peurile; trifling; weak.
    Methinks that simplicity in her countenance is rather childish than innocent. Addison.
    ✍ Childish, as applied tc persons who are grown up, is in a disparaging sense; as, a childish temper.

Webster 1913