<p><strong>Noun:</strong></p><ul><li>heroin<ul><li>an addiction, especially to heroin</li><li>an intense desire; craving</li></ul></li></ul><p><strong>Verb (used without object):</strong></p><ul><li>to have an intense desire for a drug, as during withdrawal (sometimes followed by for or out)</li><li>to have a craving for something or someone (sometimes followed by for or out)</li></ul>