<p><strong>Noun</strong></p><ul><li>a copy exactly like an original.</li><li>anything corresponding in all respects to something else.</li><li>Cards. a duplicate game.</li></ul><p><strong>Synonyms</strong></p><ul><li>reproduction</li><li>replica</li><li>facsimile</li></ul><p><strong>Antonyms</strong></p><ul><li>original</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to make an exact copy of.</li><li>to do or perform again; repeat: He duplicated his father's way of standing with his hands in his pockets.</li><li>to double; make twofold.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to become duplicate.</li></ul><p><strong>Adjective</strong></p><ul><li>exactly like or corresponding to something else: duplicate copies of a letter.</li><li>consisting of or existing in two identical or corresponding parts; double.</li></ul><p><strong>Synonyms</strong></p><ul><li>twofold</li></ul><p><strong>Cards</strong></p><ul><li>noting a game in which each team plays a series of identical hands, the winner being the team making the best total score.</li></ul>