<p><strong>Verb (used without object)</strong></p><ul><li>To sing or whistle with trills, quavers, or melodic embellishments:<ul><li>The canary warbled most of the day.</li></ul></li><li>To yodel.</li><li>(Of electronic equipment) To produce a continuous sound varying regularly in pitch and frequency.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>To sing (an aria or other selection) with trills, quavers, or melodious turns.</li><li>To express or celebrate in or as if in song; carol.</li></ul><p><strong>Noun</strong></p><ul><li>A warbled song or succession of melodic trills, quavers, etc.</li><li>The act of warbling.</li></ul><p><strong>End of Response</strong></p>