<p><strong>Adjective</strong></p><ul><li>having an odor or flavor suggestive of mold, as old buildings, long-closed rooms, or stale food.</li><li>obsolete; outdated; antiquated: musty laws.</li><li>dull; apathetic.</li></ul><p><strong>Synonyms</strong></p><ul><li>stale</li><li>moldy</li><li>dank</li></ul>