[ no passive ]
1.
( of a child ) to become too big to fit into a piece of clothing
SYN outgrow :
He's already grown out of his school uniform.
2.
to stop doing sth as you become older
SYN outgrow :
Most children suck their thumbs but they grow out of it.
3.
to develop from sth :
The idea for the book grew out of a visit to India.