noun 1.Christopher (Sp. Cristóbal Colón; It. Cristoforo Colombo), 1446?–1506, Italian navigator in Spanish service: traditionally considered the discoverer of America 1492.
2.a city in and the capital of Ohio, in the central part. 564,871.
3.a city in W Georgia. 169,441.
4.a city in central Indiana. 30,292.
5.a city in E Mississippi. 27,383.
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