1. grow up - Verb
2. grow up - Interjection
become an adult
Source: WordNetIt takes courage to grow up and become who you really are. E. E. Cummings
Is life so wretched? Isn't it rather your hands which are too small, your vision which is muddled? You are the one who must grow up. Dag Hammarskjöld
So many people try to grow up too fast, and it's not fun! You should stay a kid as long as possible! Vanessa Hudgens
He who tells no lies will not grow up. Kiganda Proverb
The mocked may grow up to dignity, but the mocker will never outgrow his juvenile behaviour. Finnish Proverb
He who knew you when you were young will not respect you when you grow up. Lebanese Proverb