Londonderry 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.
- former county of NW Northern Ireland: c. 801 sq mi (2,075 sq km)
- district in NW Northern Ireland, in the E part of the former county: 148 sq mi (383 sq km); pop. 95,000
- seaport in this district, on an inlet of the Atlantic Ocean: district pop. 95,000
Londonderry definition by American Heritage Dictionary