A section of Hadrian's Wall.Licensed from iStockPhoto
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
stone wall across N England, from Solway Firth to the Tyne: built ( 122-128) by Hadrian to protect Roman Britain from N tribes: 73.5 mi (118.3 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.
An ancient Roman wall, 118.3 km (73.5 mi) long, across northern England. Built by the emperor Hadrian c. A.D. 122-126 and extended by Severus a century later, the wall marked the northern defensive boundary of Roman Britain. Fragmentary ruins of the wall remain.