Source : Webster's Revised Unabridged Dictionary (1913)

Robin \Rob"in\, n. [Properly a pet name for Robert, originally
   meaning, famebright; F., fron OHG. Roudperht; ruod (in comp.;
   akin to AS. hr?? glory, fame, Goth. hr?peigs victorius) +
   beraht bright. See {Bright}, {Hob} a clown.] (Zo["o]l.)
   (a) A small European singing bird ({Erythacus rubecula}),
       having a reddish breast; -- called also {robin
       redbreast}, {robinet}, and {ruddock}.
   (b) An American singing bird ({Merula migratoria}), having
       the breast chestnut, or dull red. The upper parts are
       olive-gray, the head and tail blackish. Called also
       {robin redbreast}, and {migratory thrush}.
   (c) Any one of several species of Australian warblers of the
       genera {Petroica}, {Melanadrays}, and allied genera; as,
       the scarlet-breasted robin ({Petroica mullticolor}).
   (d) Any one of several Asiatic birds; as, the Indian robins.
       See {Indian robin}, below.

   {Beach robin} (Zo["o]l.), the robin snipe, or knot. See
      {Knot}.

   {Blue-throated robin}. (Zo["o]l.) See {Bluethroat}.

   {Canada robin} (Zo["o]l.), the cedar bird.

   {Golden robin} (Zo["o]l.), the Baltimore oriole.

   {Ground robin} (Zo["o]l.), the chewink.

   {Indian robin} (Zo["o]l.), any one of several species of
      Asiatic saxoline birds of the genera {Thamnobia} and
      {Pratincola}. They are mostly black, usually with some
      white on the wings.

   {Magrie robin} (Zo["o]l.), an Asiatic singing bird ({Corsycus
      saularis}), having the back, head, neck, and breast black
      glossed with blue, the wings black, and the belly white.
      

   {Ragged robin}. (Bot.) See under {Ragged}.

   {Robin accentor} (Zo["o]l.), a small Asiatic singing bird
      ({Accentor rubeculoides}), somewhat resembling the
      European robin.

   {Robin redbreast}. (Zo["o]l.)
   (a) The European robin.
   (b) The American robin.
   (c) The American bluebird.

   {Robin snipe}. (Zo["o]l.)
   (a) The red-breasted snipe, or dowitcher.
   (b) The red-breasted sandpiper, or knot.

   {Robin's plantain}. (Bot.) See under {Plantain}.

   {Sea robin}. (Zo["o]l.)
   (a) Any one of several species of American gurnards of the
       genus {Prionotus}. They are excellent food fishes. Called
       also {wingfish}. The name is also applied to a European
       gurnard.
   (b) The red-breasted merganser, or sheldrake. [Local, U.S.]
       

   {Water robin} (Zo["o]l.), a redstart ({Ruticulla
      fuliginosa}), native of India.

Source : WordNet®

robin redbreast
     n : small Old World songbird with a reddish breast [syn: {robin},
          {redbreast}, {Old World robin}, {Erithacus rubecola}]