[1] : The Collaborative International Dictionary of English v.0.48

aboriginal \ab`orig"inal\, 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
see also:
aborigines 

[2] : The Collaborative International Dictionary of English v.0.48

aboriginal \ab`orig"inal\, n.
   1. an original inhabitant of any land; one of the aborigines.
      1913 webster

   2. an animal or a plant native to the region.
      1913 webster

            it may well be doubted whether this frog is an
            aboriginal of these islands.          --darwin.
      1913 webster

[3] : WordNet (r) 2.0

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,
          native australian, australian aborigine
see also:
native nonnative primal primeval primaeval primordial 
aborigine abo native australian australian aborigine 

[4] : Moby Thesaurus II by Grady Ward, 1.0

86 moby thesaurus words for "aboriginal":
   abecedarian, aborigine, ancestral, antenatal, antepatriarchal,
   atavistic, autochthon, autochthonous, barbarian, barbaric,
   barbarous, basal, basic, beginning, budding, central, creative,
   crucial, elemental, elementary, embryonic, endemic, fetal,
   formative, foundational, fundamental, generative, genetic,
   germinal, gestatory, homebred, homegrown, humanoid, in embryo,
   in its infancy, in ovo, in the bud, inaugural, inceptive, inchoate,
   inchoative, incipient, incunabular, indigene, indigenous, infant,
   infantile, initial, initiative, initiatory, introductory,
   inventive, nascent, natal, native, native-born, original,
   parturient, patriarchal, postnatal, preadamite, preglacial,
   pregnant, prehistoric, prehuman, prenatal, primal, primary, prime,
   primeval, primitive, primogenial, primoprimitive, primordial,
   pristine, procreative, protogenic, protohistoric, protohuman,
   radical, rudimental, rudimentary, savage, seminal, ur,
   vernacular

Aboriginal >> A Words
Aboriginal, definition of term: Aboriginal
aboriginal_pag1.html