Definition of great age:
(n) :
Any member of the taxonomic family Hominidae, including Homo, and also many similar extinct species.
(n) :
Any member of the taxonomic family Hominidae, including gorilla, orangutan, chimpanzee, excluding Homo.
(n) :
(archaic) A large non-human primate, such as a gorilla, an orangutan, or a chimpanzee.