<p><strong>Noun:</strong></p><ul><li>a person, animal, or thing that howls.</li><li>Also called howler monkey.</li><li>any large, prehensile-tailed tropical American monkey of the genus <em>Alouatta</em>, the males of which make a howling noise: some species are endangered.</li><li>a mistake, especially an embarrassing one in speech or writing, that evokes laughter; a very humorous mistake or a funny blunder.</li><li>Informal: something that makes a piercing and often prolonged noise, as an alarm.</li></ul>