Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
river flowing southeastward across N Argentina into the Paraguay River: c. 650 mi (1,046 km)
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A river of northern Argentina rising near the Bolivian border and flowing about 1,046 km (650 mi) generally southeast to the Paraguay River at the Paraguay border.