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English definition of “whistle”

whistle

verb [I/T]  /ˈhwɪs·əl, ˈwɪs-/ us  
to make a musical sound by forcing the breath through a small passage between the lips or through a special device: [I] I whistled to my dog and she came running back. [I] fig.The wind whistled through the trees.

whistle

noun [C]  /ˈhwɪs·əl, ˈwɪs-/ us  
A whistle is also a device that makes a loud, high sound when you blow into it.
(Definition of whistle from the Cambridge Academic Content Dictionary © Cambridge University Press)
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