The Collaborative International Dictionary of English v.0.48:

Chat \Chat\, n.
   1. Light, familiar talk; conversation; gossip.
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            Snuff, or fan, supply each pause of chat,
            With singing, laughing, ogling, and all that.
                                                  --Pope.
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   2. (Zool.) A bird of the genus Icteria, allied to the
      warblers, in America. The best known species are the
      yellow-breasted chat (Icteria viridis), and the
      long-tailed chat (Icteria longicauda). In Europe the
      name is given to several birds of the family
      Saxicolid[ae], as the stonechat, and whinchat.
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   Bush chat. (Zool.) See under Bush.
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