Wordnet 3.0
ADJECTIVE (1)
1. 
 (of animals) fully developed; 
- Example: "an adult animal"- Example: "a grown woman"[syn: adult, big, full-grown, fully grown, grown, grownup]
WordNet (r) 3.0 (2006):
fully grown
    adj 1: (of animals) fully developed; "an adult animal"; "a grown
           woman" [syn: adult, big, full-grown, fully grown,
           grown, grownup]