<p><strong>Noun</strong></p><ul><li>Robert Robert Clarke, 1928–2018, U.S. painter of pop art.</li><li>a state in the central United States: a part of the Midwest.</li><li>36,291 sq. mi. (93,995 sq. km).</li><li>Indianapolis.</li><li>IN (for use with zip code), Ind.</li><li>a city in western central Pennsylvania.</li></ul>