<p><strong>Noun</strong></p><ul><li>any hollow place; hollow.</li><li>Anatomy: a hollow space within the body, an organ, a bone, etc.</li><li>a hollow space or a pit in a tooth, most commonly produced by caries.</li><li>A cavity may be artificially made to support dental restorations.</li></ul><p><strong>Verb</strong> (used with object)</p><ul><li>to make a hole or holes in.</li></ul>