Relating to, intended for, or befitting adults:
Having reached full size or maturity; fully grown
(of animals) fully developed
Produced or cultivated in a certain way or place:
Juvenile is defined as someone who is still a child.
Find another word for grownup. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for grownup, like: big, adult, full-grown, fully grown, grown, juvenile, grown-up, little-kids and kiddy.