<p><strong>Verb (used without object)</strong></p><ul><li>to become lively, cheerful, or vigorous, as after depression or sickness (usually followed by up)</li><li>to act, or carry oneself, in a jaunty manner</li><li>to put oneself forward briskly or presumptuously</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to make smart, trim, or jaunty (sometimes followed by up or out)</li><li>to perk up a suit with a new white blouse</li><li>to raise smartly or briskly (often followed by up or out)</li><li>to perk one's head up</li></ul><p><strong>Adjective</strong></p><ul><li>perky</li><li>jaunty</li><li>a perk manner</li></ul>