from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. Toward or near the mouth of a river; in the direction of the current: swam downriver; a downriver canoe race.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Closer to the mouth of a river
- adv. Travelling in the direction of the river current.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. away from the source or with the current
down- + river (Wiktionary)