<p><strong>Verb</strong></p><ul><li>(used without object) to express mirth, pleasure, derision, or nervousness with an audible, vocal expulsion of air from the lungs that can range from a loud burst of sound to a series of quiet chuckles and is usually accompanied by characteristic facial and bodily movements.</li><li>to experience the emotion so expressed: He laughed inwardly at the scene.</li><li>to produce a sound resembling human laughter: A coyote laughed in the dark.</li></ul><p><strong>Noun</strong></p><ul><li>the act or sound of laughing; laughter.</li><li>an expression of mirth, derision, etc., by laughing.</li><li>Informal: something that provokes laughter, amusement, or ridicule: After all the advance publicity, the prizefight turned out to be a laugh.</li><li>laughs, Informal: fun; amusement.</li></ul><p><strong>Verb Phrase</strong></p><ul><li>to make fun of; deride; ridicule: They were laughing at him, not along with him.</li><li>to be scornful of; reject: They stopped laughing at the unusual theory when it was found to be predictive.</li><li>to find sympathetic amusement in; regard with humor: We can learn to laugh a little at even our most serious foibles.</li><li>to dismiss as ridiculous, trivial, or hollow: He had received threats but laughed them off as the work of a crank.</li></ul>