<p><strong>noun</strong></p><ul><li>any of various birds that winter in a cold, snowy climate, especially the dark-eyed junco and the snow bunting.</li><li>Informal: a person who vacations in or moves to a warmer climate during cold weather.</li><li>Slang: Disparaging and Offensive: a person addicted to cocaine or heroin.</li><li>an arena of operation or activity.</li></ul>