Webster's Revised Unabridged Dictionary · 1913

Whistle

Whistle , intransitive verb

[Anglo-Saxon hwistlian; akin to Swedish hvissla, Danish hvisle, Icelandic hvīsla to whisper, and English whisper. r43. 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

Whistle , transitive verb

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
I 'ld whistle her off, and let her down the wind To prey at fortune. — Shakespeare
Collocations (1)
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.

“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.” Nares.

Whistle , noun

[Anglo-Saxon hwistle a pipe, flute, whistle. See Whistle, v. i.]

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. [Colloquial]
So was her jolly whistle well ywet. — Chaucer
Let's drink the other cup to wet our whistles. — Walton
Collocations (1)
Whistle duck (Zoology) , the American golden-eye.