White River1. A river of northern Arkansas and southern Missouri flowing about 1,160 km (720 mi) generally southeast to the Mississippi River.2. A river, about 260 km (160 mi) long, of northwest Colorado and eastern Utah flowing westward to the Green River.3. A river, about 510 km (320 mi) long, of southern Indiana flowing southwest to the Wabash River.4. A river of northwest Nebraska and southern South Dakota flowing about 520 km (325 mi) northeast and east to the Missouri River.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.White? Riv?er n. 1. a river flowing SE from NW Arkansas into the Mississippi River. 690 mi. (1110 km) long. 2. a river flowing NE from NW Nebraska to the Missouri River in S South Dakota. 325 mi. (525 km) long. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.