What does aboriginal mean?
The definition of aboriginal
Ab`o*rig”i*nal, a.
Etym: [See Aborigines.]

1 First; original; indigenous; primitive; native; as, the aboriginal tribes of America. “Mantled o’er with aboriginal turf.” Wordsworth.
2 Of or pertaining to aborigines; as, a Hindoo of aboriginal blood.

Ab`o*rig”i*nal, n.
1 An original inhabitant of any land; one of the aborigines.
2 An animal or a plant native to the region. It may well be doubted whether this frog is an aboriginal of these islands. Darwin.