whis·tle /ˈhwɪsəl, ˈwɪ-/
 口哨,汽笛,嘯嘯聲,口哨聲(vi.)吹口哨,鳴汽笛,發噓噓聲(vt.)用口哨通知
 Whis·tle v. i. [imp. & p. p. Whistled p. pr. & vb. n. Whistling ]
 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.
 Whis·tle, v. t.
 1. To form, utter, or modulate by whistling; as, to whistle a tune or an air.
 2. To send, signal, or call by a whistle.
    He chanced to miss his dog; we stood still till he had whistled him up.   --Addison.
 To whistle off. (a) To dismiss by a whistle; -- a term in hawking. “AS a long-winged hawk when he is first whistled off the fist, mounts aloft.” --Burton. (b) Hence, in general, to turn loose; to abandon; to dismiss.
 I 'ld whistle her off, and let her down the wind
 To prey at fortune.   --Shak.
 Note: ☞ “A hawk seems to have been usually sent off in this way, against the wind when sent in search of prey; with or down the wind, when turned loose, and abandoned.”
 Whis·tle, n.
 1. A sharp, shrill, more or less musical sound, made by forcing the breath through a small orifice of the lips, or through or instrument which gives a similar sound; the sound used by a sportsman in calling his dogs; the shrill note of a bird; as, the sharp whistle of a boy, or of a boatswain's pipe; the blackbird's mellow whistle.
 Might we but hear
 The folded flocks, penned in their wattled cotes, . . .
 Or whistle from the lodge.   --Milton.
    The countryman could not forbear smiling, . . . and by that means lost his whistle.   --Spectator.
    They fear his whistle, and forsake the seas.   --Dryden.
 2. The shrill sound made by wind passing among trees or through crevices, or that made by bullet, or the like, passing rapidly through the air; the shrill noise (much used as a signal, etc.) made by steam or gas escaping through a small orifice, or impinging against the edge of a metallic bell or cup.
 3. An instrument in which gas or steam forced into a cavity, or against a thin edge, produces a sound more or less like that made by one who whistles through the compressed lips; as, a child's whistle; a boatswain's whistle; a steam whistle (see Steam whistle, under Steam).
    The bells she jingled, and the whistle blew.   --Pope.
 4. The mouth and throat; -- so called as being the organs of whistling.  [Colloq.]
    So was her jolly whistle well ywet.   --Chaucer.
    Let's drink the other cup to wet our whistles.   --Walton.
 Whistle duck Zool., the American golden-eye.
 ◄ ►
 whistle
      n 1: the sound made by something moving rapidly or by steam
           coming out of a small aperture [syn: whistling]
      2: the act of signalling (e.g., summoning) by whistling or
         blowing a whistle; "the whistle signalled the end of the
         game" [syn: whistling]
      3: acoustic device that forces air or steam against an edge or
         into a cavity and so produces a loud shrill sound
      4: an inexpensive fipple flute [syn: pennywhistle, tin
         whistle]
      v 1: make whistling sounds; "He lay there, snoring and whistling"
      2: move with, or as with, a whistling sound; "The bullets
         whistled past him"
      3: utter or express by whistling; "She whistled a melody"
      4: move, send, or bring as if by whistling; "Her optimism
         whistled away these worries"
      5: make a whining, ringing, or whistling sound; "the kettle was
         singing"; "the bullet sang past his ear" [syn: sing]
      6: give a signal by whistling; "She whistled for her maid"