Definition of "outwash" []

• Sediment deposited by streams flowing away from a melting glacier. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I don't even want to think about what the soils conditions are at the Duwamish River (aka Green River, aka White River) where outwash from the Green River Valley, and hence Mount Rainier's ancient mudflows, has deposited itself in an ancient alluvial fan in Elliot Bay -- constrained by the West Seattle highlands on the west and the ridge that separates the Sound from Lake Washington."
• "I knew them from where some of them breed on the vast glacial outwash plains in Iceland where I led several of Brathay Exploration Group's annual expeditions."
• "Towns lying near glacial outwash streams are particularly vulnerable to such catastrophic flooding."