ph.

1. 长大成人；成熟
When someone grows up, they gradually change from being a child into being an adult.

2. 别犯傻；别孩子气
If you tell someone to grow up, you are telling them to stop behaving in a silly or childish way.

3. 形成；兴起；逐渐发展
If something grows up, it starts to exist and then becomes larger or more important.

1. become an adult