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A river of eastern Peru and northwest Brazil flowing about 1,930 km (1,200 mi) northeast to the Amazon 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.
(Placename) a river in South America, rising in E central Peru and flowing northeast across NW Brazil to join the Amazon. Length: 1900 km (1200 miles)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a river in E and W South America, flowing NE from E Peru through W Brazil to the Amazon. 1200 mi. (1930 km) long.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.