From WordNet (r) 2.0 (August 2003) [wn]:
aboriginal
adj 1: being or composed of people inhabiting a region from the
beginning; "native Americans"; "the aboriginal peoples
of Australia" [syn: native] [ant: nonnative]
2: having existed from the beginning; in an earliest or
original stage or state; "aboriginal forests"; "primal
eras before the appearance of life on earth"; "the forest
primeval"; "primordial matter"; "primordial forms of life"
[syn: primal, primeval, primaeval, primordial]
n : a dark-skinned member of a race of people living in
Australia when Europeans arrived [syn: Aborigine,
Abo, Aboriginal, native Australian, {Australian
Aborigine}]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Aboriginal \Ab`o*rig"i*nal\, a. [See Aborigines.]
1. First; original; indigenous; primitive; native; as, the
aboriginal tribes of America. "Mantled o'er with
aboriginal turf." --Wordsworth.
[1913 Webster]
2. Of or pertaining to aborigines; as, a Hindu of aboriginal
blood.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Aboriginal \Ab`o*rig"i*nal\, n.
1. An original inhabitant of any land; one of the aborigines.
[1913 Webster]
2. An animal or a plant native to the region.
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It may well be doubted whether this frog is an
aboriginal of these islands. --Darwin.
[1913 Webster]