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whistle

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1whistle/ˈwɪsəl/noun
pluralwhistles
1whistle
/ˈwɪsəl/
noun
pluralwhistles
Learner's definition of WHISTLE  
[count]
: a small device that makes a very high and loud sound when a person blows air through it
   b  : a device through which air or steam is forced to produce a very high and loud sound
— see also bells and whistles
: a high and loud sound made by forcing air through your lips or teeth
— see also wolf whistle
: a sound made by blowing

blow the whistle

: to tell police, reporters, etc., about something (such as a crime) that has been kept secret — usually + on
— see also whistle-blower

clean as a whistle

informal
: very clean

wet your whistle

US, informal
: to have a drink
2whistle/ˈwɪsəl/verb
whistleswhistledwhistling
2whistle
/ˈwɪsəl/
verb
whistleswhistledwhistling
Learner's definition of WHISTLE  
: to make a high sound by blowing air through your lips or teeth
[no object]
[+ object]
[no object]  : to produce a high and loud sound by forcing air or steam through a device
always followed by an adverb or preposition[no object]  : to move, pass, or go very fast with a high sound

whistle in the dark

informalorwhistle past the graveyard
: to act or talk as if you are relaxed and not afraid when you are actually afraid or nervous

— whistling

adjective
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