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 721 km (448 mi) long, rising in northwest Yukon Territory, Canada, and flowing north then west to the Yukon River in northeast Alaska. It was discovered in 1842.