whistle Meaning in Cambridge American English Dictionary
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Meaning of "whistle" - American English Dictionary

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whistleverb [I/T]

 us   /ˈhwɪs·əl, ˈwɪs-/
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.

whistlenoun [C]

 us   /ˈhwɪs·əl, ˈwɪs-/
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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