Willamette definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
river in W Oreg., flowing north into the Columbia River near Portland: c. 190 mi (306 km)
Origin: ; from uncertain or unknown; perhaps Amerindian place name
Willamette definition by American Heritage Dictionary
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, about 473 km (294 mi) long, of northwest Oregon flowing generally northward to the Columbia River near Portland. The Willamette Valley, a fertile agricultural region, was first settled in the 1830s by pioneers traveling west along the Oregon Trail.