grow out of sth phr v [T] 1 if children grow out of clothes, they become too big to wear them 〔小孩〕长得穿不下〔原来的衣服〕 2 to stop doing something as you get older 〔因年龄增长而〕改掉，戒除〔某习惯〕: Sarah still sucks her thumb, but she'll grow out of it. 莎拉还要吮大拇指，不过她长大了就会改掉的。