a US state in the western part of the Middle West, also called the Cornhusker State. The Missouri River forms its eastern border. The largest city is Omaha, and the capital city is Lincoln. It was part of the Louisiana Purchase and was explored by Lewis and Clark. Its agricultural products include corn, wheat, cattle and pigs and it also makes industrial machinery and electronic equipment. Its tourist attractions include Scotts Bluff National Monument and Chimney Rock National Historic Site.