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A river of central and northern Brazil rising in several streams and flowing about 1,980 km (1,230 mi) generally northward to the Amazon River at the head of the Amazon delta.
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 central Brazil, rising on the Mato Grosso plateau and flowing north to the Amazon delta, with over 650 km (400 miles) of rapids in its middle course. Length: 1932 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 flowing N through central Brazil to the Amazon. 1300 mi. (2090 km) long.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.