1. Of, pertaining to, befitting, or resembling, a child. “Childish innocence.”
2. Puerile; trifling; weak.
Methinks that simplicity in her countenance is rather childish than innocent. --Addison.
Note: ☞ Childish, as applied to persons who are grown up, is in a disparaging sense; as, a childish temper.
adj : indicating a lack of maturity; "childish tantrums";
"infantile behavior" [syn: infantile]