/ Dictionary / Index L Londonderry: Meaning and Definition of Find definitions for: Lon•don•der•ry Pronunciation: (lun'dun-der"ē), [key] — n. a county in N Northern Ireland. 130,889; 804 sq. mi. (2082 sq. km). its county seat: a seaport. 54,000. a town in SE New Hampshire. 13,598. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. London Company Londoner Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language