whistling

Noun
  1. The sound made by something moving rapidly or by steam coming out of a small aperture (synset 107414756)
  2. The act of whistling a tune (synset 100548491)
    "his cheerful whistling indicated that he enjoyed his work"
  3. The act of signalling (e.g., summoning) by whistling or blowing a whistle (synset 106818956)
    "the whistle signalled the end of the game"

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