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.
› [ I + adv/prep ] to make a long, high sound while moving quickly through or past something:
I stepped out of the building and immediately a bullet whistled past my head.
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Sounds made by humans with their mouths
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B2 the sound made by someone or something whistling:
I recognized my father's tuneless whistle.
It sounded like the whistle of an old-fashioned steam train.
Thesaurus: synonyms and related words
Sounds made by humans with their mouths
You can also find related words, phrases, and synonyms in the topics: