Noah Webster's Dictionary 1. (v. i.) 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. 2. (v. i.) 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. (v. i.) To sound shrill, or like a pipe; to make a sharp, shrill sound; as, a bullet whistles through the air. 4. (v. t.) To form, utter, or modulate by whistling; as, to whistle a tune or an air. 5. (v. t.) To send, signal, or call by a whistle. 6. (n.) 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. 7. (n.) 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. 8. (n.) 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). 9. (n.) The mouth and throat; -- so called as being the organs of whistling.

Multi-Version Concordance Whistle (3 Occurrences) Isaiah 5:26 He will lift up a banner to the nations from far, and he will whistle for them from the end of the earth. Behold, they will come speedily and swiftly. (WEB NAS RSV NIV) Isaiah 7:18 It will happen in that day that Yahweh will whistle for the fly that is in the uttermost part of the rivers of Egypt, and for the bee that is in the land of Assyria. (WEB NAS RSV NIV) Zechariah 10:8 I will signal for them, and gather them; for I have redeemed them; and they will increase as they have increased. (See NAS)