A large natural stream of water emptying into an ocean, lake, or other body of water and usually fed along its course by converging tributaries.
A stream or abundant flow: a river of tears.
Up the river Slang In or into prison.
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.