nounThe 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 flat or level section of a stream where no flow or motion of the current is discernible and the water is still.
- stillˈ-waˌter adjective