Whistle \Whis"tle\, v. i. [imp. & p. p. Whistled; p. pr. & vb. n. Whistling.]

[AS. hwistlian; akin to Sw. hvissla, Dan. hvisle, Icel. hv[=i]sla to whisper, and E. whisper. [root]43. See Whisper.]

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.

The weary plowman leaves the task of day, And, trudging homeward, whistles on the way. --Gay.

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.

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

The wild winds whistle, and the billows roar. --Pope.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Whistling \Whis"tling\, a. & n. from Whistle, v.

Whistling buoy. (Naut.) See under Buoy.

Whistling coot (Zo["o]l.), the American black scoter.

Whistling Dick. (Zo["o]l.)
   (a) An Australian shrike thrush (Colluricincla Selbii).
   (b) The song thrush. [Prov. Eng.]

Whistling duck. (Zo["o]l.)
   (a) The golden-eye.
   (b) A tree duck.

Whistling eagle (Zo["o]l.), a small Australian eagle (Haliastur sphenurus); -- called also whistling hawk, and little swamp eagle.

Whistling plover. (Zo["o]l.)
   (a) The golden plover.
   (b) The black-bellied, or gray, plover.

Whistling snipe (Zo["o]l.), the American woodcock.

Whistling swan. (Zo["o]l.)
   (a) The European whooper swan; -- called also wild swan, and elk.
   (b) An American swan (Olor columbianus). See under Swan.

Whistling teal (Zo["o]l.), a tree duck, as Dendrocygna awsuree of India.

Whistling thrush. (Zo["o]l.)
   (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.]

Source: Webster's Revised Unabridged Dictionary (1913)