Etymology Dissimilated from Middle English upgrowen.
1
To mature and become an adult.
What do you want to be when you grow up?
Attila grew up a nomad on the plains of Hungary
1 more example
I'm in the place where I grew up, where my alma mater is.2021 December 29, Stephen Roberts, “Stories and facts behind railway plaques: Evesham (1870)”, in RAIL, number 947, page 58:
2
To start to develop; to flourish.
Socialism grew up in the industrial cities.
A town grew up at the junction of the two rivers.
3
Idiomatic To stop acting as or like a child (often used as an imperative interjection).
Will you grow up please, and stop making silly faces?