<p><strong>Noun</strong></p><ul><li>Law.<ul><li>the killing of another human being under conditions specifically covered in law</li><li>In the U.S., special statutory definitions include murder committed with malice aforethought, characterized by deliberation or premeditation or occurring during the commission of another serious crime, as robbery or arson</li><li>first-degree murder, or murder one, and murder by intent but without deliberation or premeditation second-degree murder, or murder two</li><li>Slang. something extremely difficult or perilous: That final exam was murder!</li><li>a group or flock of crows</li></ul></li></ul><p><strong>Verb</strong></p><ul><li><p>(used with object)</p><ul><li>Law. to kill by an act constituting murder</li><li>to kill or slaughter inhumanly or barbarously</li><li>to spoil or mar by bad performance, representation, pronunciation, etc.: The tenor murdered the aria</li></ul></li><li><p>(used without object)</p><ul><li>to commit murder</li></ul></li></ul>