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

whistle \whis"tle\, v. i. imp.  p. p. whistled; p. pr.  vb.
   n. whistling. as. hwistlian; akin to sw. hvissla, dan.
   hvisle, icel. hvimacsla to whisper, and e. whisper.
   root43. see whisper.
   1913 webster
   1. to make a kind of musical sound, or series of sounds, by
      forcing the breath through a small orifice formed by
      contracting the lips; also, to emit a similar sound, or
      series of notes, from the mouth or beak, as birds.
      1913 webster

            the weary plowman leaves the task of day,
            and, trudging homeward, whistles on the way. --gay.
      1913 webster

   2. to make a shrill sound with a wind or steam instrument,
      somewhat like that made with the lips; to blow a sharp,
      shrill tone.
      1913 webster

   3. to sound shrill, or like a pipe; to make a sharp, shrill
      sound; as, a bullet whistles through the air.
      1913 webster

            the wild winds whistle, and the billows roar.
                                                  --pope.
      1913 webster
see also:
whistled whistling whisper 

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

whistling \whis"tling\,
   a.  n. from whistle, v.
   1913 webster

   whistling buoy. naut. see under buoy.

   whistling coot zool., the american black scoter.

   whistling dick. zool.
   a an australian shrike thrush colluricincla selbii.
   b the song thrush. prov. eng.

   whistling duck. zool.
   a the golden-eye.
   b a tree duck.

   whistling eagle zool., a small australian eagle
      haliastur sphenurus; -- called also whistling hawk,
      and little swamp eagle.

   whistling plover. zool.
   a the golden plover.
   b the black-bellied, or gray, plover.

   whistling snipe zool., the american woodcock.

   whistling swan. zool.
   a the european whooper swan; -- called also wild swan,
       and elk.
   b an american swan olor columbianus. see under swan.
       

   whistling teal zool., a tree duck, as dendrocygna
      awsuree of india.

   whistling thrush. zool.
   a any one of several species of singing birds of the genus
       myiophonus, native of asia, australia, and the east
       indies. they are generally black, glossed with blue, and
       have a patch of bright blue on each shoulder. their note
       is a loud and clear whistle.
   b the song thrush. prov. eng.
       1913 webster
see also:
whistle whistling buoy buoy whistling coot whistling dick colluricincla selbii 
whistling duck whistling eagle haliastur sphenurus whistling hawk little swamp eagle 
whistling plover whistling snipe whistling swan wild swan elk 
olor columbianus swan whistling teal dendrocygna awsuree whistling thrush 
myiophonus 

[3] : WordNet (r) 2.0

whistling
     n 1: the sound made by something moving rapidly or by steam
          coming out of a small aperture syn: whistle
     2: the act of whistling a tune; "his cheerful whistling
        indicated that he enjoyed his work"
     3: the act of signalling e.g., summoning by whistling or
        blowing a whistle; "the whistle signalled the end of the
        game" syn: whistle
see also:
whistle 

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

74 moby thesaurus words for "whistling":
   acute, argute, assibilation, buzz, creaky, ear-piercing,
   effervescence, effervescing, fizz, fizzle, fizzling, frication,
   frictional rustling, hiss, hissing, howling, hush, hushing, keen,
   keening, lisp, penetrating, piercing, piping, reedy, rhonchus,
   screaky, screeching, screechy, sharp, shrieking, shrieky, shrill,
   shush, shushing, sibilance, sibilation, siffle, sigmatism, siss,
   sissing, sizz, sizzle, sizzling, sneeze, sneezing, sniff, sniffle,
   snore, snort, snuff, snuffle, spit, splutter, sputter, squash,
   squeaking, squeaky, squelch, squish, sternutation, stertor, swish,
   thin, ululant, wailing, wheeze, whining, whish, whistle,
   white noise, whiz, whoosh, zip

Whistling >> W Words
Whistling, definition of term: Whistling
whistling_pag1.html

Whistling Swan >> W Words
Whistling Swan, definition of term: Whistling Swan
whistling+swan_pag1.html