from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The area between the banks of a river ordinarily covered by water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The path where a river runs, or where a river once ran; the bottom earthen part of a river, not including the riverbanks.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a channel occupied (or formerly occupied) by a river
Sorry, no etymologies found.