<p><strong>noun</strong></p><ul><li>a loud cry or shout, as of excitement or joy.</li><li>the sound made by a person suffering from whooping cough.</li></ul><p><strong>verb</strong></p><ul><li>(used without object) to utter a loud cry or shout in expressing enthusiasm, excitement, etc.</li><li>to cry as an owl, crane, or certain other birds.</li><li>to make the characteristic sound accompanying the deep intake of air following a series of coughs in whooping cough.</li><li>(used with object) to utter with or as if with a whoop.</li><li>to whoop to or at.</li><li>to call, urge, pursue, or drive with whoops: to whoop dogs on.</li></ul><p><strong>interjection</strong></p><ul><li>(used as a cry to attract attention from afar, or to show excitement, encouragement, enthusiasm, etc.)</li></ul><p><strong>verb phrase</strong></p><ul><li>Informal: to promote or praise; extol: a class reunion where they whoop up the good old days.</li></ul>