<p><strong>Noun</strong></p><ul><li>the lair or shelter of a wild animal, especially a predatory mammal.</li><li>a room, often secluded, in a house or apartment, designed to provide a quiet, comfortable, and informal atmosphere for conversation, reading, writing, etc.</li><li>a cave used as a place of shelter or concealment.</li><li>a squalid or vile abode or place: dens of misery.</li><li>one of the units of a cub scout pack, analogous to a patrol in the Boy Scouts.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to drive or pursue (an animal) into its den.</li><li>to kill (an animal) inside its den.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to live in or as if in a den.</li></ul>