Mersey definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
river in NW England, flowing into the Irish Sea through an estuary at Liverpool: 70 mi (113 km)
Mersey definition by American Heritage Dictionary
A river of northwest England flowing about 113 km (70 mi) generally westward to the Irish Sea at Liverpool. Its large estuary is navigable for oceangoing vessels.