<p><strong>Noun</strong></p><ul><li>Any of several small, chiefly Old World songbirds of the subfamily Sylviidae.</li><li>A small New World songbird of the family Parulidae, many species of which are brightly colored.</li><li>A person or thing that warbles.</li><li>A cantus firmus or theme chosen for contrapuntal development.</li><li>A simple and unadorned melody or air.</li></ul>