Childish | Mean of childish in English Dictionary

/ˈtʃaɪldɪʃ/

• of a child or typical of a child
1. She has a childish face.
2. a letter written in childish scrawl
3. He opened the gifts with childish delight.
• having or showing the unpleasant qualities (such as silliness or lack of maturity) that children often have
1. a childish prank
2. We're tired of their childish games.
3. I find his humor very childish.