Full-grown (adjective)

Having reached the end of its growth; fully grown.

Origin:

From middle english growen, from old english grōwan, grōwian.

Examples:

1. The full-grown trees cast a deep shadow over the park.
2. A full-grown giraffe is around 18 feet tall.
3. The horse was a beautiful full-grown mare.
4. The plant was a healthy full-grown rose bush.
5. The puppies had grown into full-grown dogs.