<p><strong>Noun</strong></p><ul><li>A person or thing that whistles.</li><li>Something that makes a sound like a whistle: The windstorm was a 60-mile-an-hour whistler.</li><li>Any of various birds whose wings whistle in flight, especially the goldeneye.</li><li>A large marmot, <em>Marmota caligata</em>, of mountainous northwestern North America, closely related to the woodchuck.</li><li>A horse afflicted with whistling.</li><li>A whistling sound heard on a radio, a type of interference caused by distant lightning.</li></ul>