What does the word whistle mean?

Usage examples for whistle

  1. The guard- who was an up- country man- treated this laugh with contempt, and blew his whistle sharply. – The Delectable Duchy by Arthur Thomas Quiller-Couch
  2. The whistle of a train, the train from Paris, mounted through the still air to their ears. – The Truants by A. E. W. (Alfred Edward Woodley) Mason
  3. But Alan's whistle was heard, as he came out of the house; and he and Molly went away down the street, leaving Polly standing alone at the gate. – Half a Dozen Girls by Anna Chapin Ray
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