Source : Webster's Revised Unabridged Dictionary (1913)

Blackbird \Black"bird\, n.
   1. Among slavers and pirates, a negro or Polynesian. [Cant]

   2. A native of any of the islands near Queensland; -- called
      also {Kanaka}. [Australia]

Blackbird \Black"bird\ (bl[a^]k"b[~e]rd), n. (Zo["o]l.)
   In England, a species of thrush ({Turdus merula}), a singing
   bird with a fin note; the merle. In America the name is given
   to several birds, as the {Quiscalus versicolor}, or crow
   blackbird; the {Agel[ae]us ph[oe]niceus}, or red-winged
   blackbird; the cowbird; the rusty grackle, etc. See
   {Redwing}.

Source : WordNet®

blackbird
     n 1: any bird of the family Icteridae whose male is black or
          predominantly black [syn: {New World blackbird}]
     2: common black European thrush [syn: {merl}, {merle}, {ouzel},
         {ousel}, {European blackbird}, {Turdus merula}]