Meaning of “grow into sb/sth” - Learner’s Dictionary

grow into sb/sth

phrasal verb with grow uk us /ɡrəʊ/ verb (past tense grew, past participle grown)

to develop into a particular type of person or thing:

In the last few years, he's grown into a fine, responsible young man.

(Definition of “grow into sb/sth” from the Cambridge Learner’s Dictionary © Cambridge University Press)