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A river, about 680 km (420 mi) long, rising in eastern Colorado and flowing northeast and east across southern Nebraska then southeast through northeast-central Kansas, where it joins the Smoky Hill River to form the Kansas River.
a river flowing E from E Colorado through Nebraska and Kansas into the Kansas River. 422 mi. (680 km) long.
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|Noun||1.||Republican River - a tributary of the Kansas River that flows from eastern Colorado eastward through Nebraska and Kansas|