Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
river in NW South America, flowing from SW Colombia along the Colombian-Peruvian border into the Amazon in NW Brazil: c. 1,000 mi (1,609 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 northwest South America rising in southwest Colombia and flowing about 1,609 km (1,000 mi) along the Colombia-Peru border to the Amazon River in northwest Brazil.