From WordNet (r) 2.0 (August 2003) [wn]:
grown
adj : (of animals) fully developed; "an adult animal"; "a grown
woman" [syn: adult, big, full-grown, {fully
grown}, grownup]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Grown \Grown\,
p. p. of Grow.
[1913 Webster]