Meaning of “grow up” - Learner’s Dictionary

grow up

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

A2 to become older or an adult:

She grew up in New York.

to develop or become bigger or stronger:

A close friendship had grown up between them.

(Definition of “grow up” from the Cambridge Learner’s Dictionary © Cambridge University Press)