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English definition of “whistle”

whistle

verb     /ˈwɪs.l̩/
B2 [I or T] to make a high sound by forcing air through a small hole or passage, especially through the lips, or through a special device held to the lips: He whistled as he worked. On the days when she wore a skirt the men on the building site would whistle at her. Someone was whistling Beatles tunes outside my window. The referee whistled and the game was over.Sounds made by humans with their mouths [I + adv/prep] to make a long, high sound while moving quickly through or past something: She heard the wind whistling through the trees and the howl of a distant wolf. I stepped out of the building and immediately a bullet whistled past my head.Sounds made by objects, movement or impact [I] When birds whistle, they sing in high musical notes: The birds were whistling in the early morning quiet.Animal (non-human) sounds
(Definition of whistle verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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