Castle ruins by the river Boyne.Licensed from iStockPhoto
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
river in E Ireland: site of a battle (1690) in which the forces of William III of England defeated the Jacobites of James II, resulting in his flight to France: c. 70 mi (113 km)
Used by arrangement with John Wiley & Sons, Inc.
The 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 river of eastern Ireland flowing about 113 km (70 mi) to the Irish Sea. In the Battle of the Boyne on July 1, 1690, the armies of King William III defeated the forces of James II, who fled to France.