Castle ruins by the river Boyne.
Boyne 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 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)
Boyne definition by American Heritage Dictionary
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.