<p><strong>Noun</strong></p><ul><li>(plural) chatelaines.</li><li>the mistress of a castle.</li><li>the mistress of an elegant or fashionable household.</li><li>a hooklike clasp or a chain for suspending keys, trinkets, scissors, a watch, etc., worn at the waist by women.</li><li>a woman's lapel ornament resembling this.</li></ul>