whistling
1. [ noun ] (music) the act of whistling a tune
Examples:

"his cheerful whistling indicated that he enjoyed his work"

Related terms: music whistle
2. [ noun ] the sound made by something moving rapidly or by steam coming out of a small aperture
Synonyms: whistle
Related terms: sound whistle
3. [ noun ] the act of signalling (e.g., summoning) by whistling or blowing a whistle
Synonyms: whistle
Examples:

"the whistle signalled the end of the game"

Related terms: signal whistle
Similar spelling:   whistle
  whistler
  Westling
  whistlestop