Source : Webster's Revised Unabridged Dictionary (1913)

Whistler \Whis"tler\, n. [AS. hwistlere.]
   1. One who, or that which, whistles, or produces or a
      whistling sound.

   2. (Zo["o]l.)
      (a) The ring ousel.
      (b) The widgeon. [Prov. Eng.]
      (c) The golden-eye.
      (d) The golden plover and the gray plover.

   3. (Zo["o]l.) The hoary, or northern, marmot ({Arctomys
      pruinosus}).

   4. (Zo["o]l.) The whistlefish.

Source : WordNet®

Whistler
     n 1: United States painter (1834-1903) [syn: {James Abbott
          McNeill Whistler}]
     2: makes a loud high sound
     3: large North American mountain marmot [syn: {hoary marmot}, {whistling
        marmot}, {Marmota caligata}]
     4: large-headed swift-flying diving duck of arctic regions
        [syn: {goldeneye}, {Bucephela clangula}]
     5: Australian and southeastern Asian birds with a melodious
        whistling call [syn: {thickhead}]