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English definition of “whistle”

whistle

verb uk   /ˈwɪs.l̩/ us  
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

whistle

noun [C] uk   /ˈwɪs.l̩/ us  
B2 the sound made by someone or something whistling: From the bottom of the garden I recognized my father's tuneless whistle. It sounded like the whistle of an old-fashioned steam train. She listened to the whistle of the wind through the trees.Sounds made by humans with their mouthsSounds made by objects, movement or impact an object that you hold to your lips and blow through in order to make a loud, high sound: The referee blew his whistle for half-time.Wind instruments
(Definition of whistle from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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