whistling
noun(whis-tling)
the sound made by something moving rapidly or by steam coming out of a small aperture
whistling
noun(whis-tling)
the act of signalling (e.g., summoning) by whistling or blowing a whistle
whistling
noun(whis-tling)
the act of whistling a tune
Examples:
His cheerful whistling indicated that he enjoyed his work.