District of Columbia: Meaning and Definition of

Dis'trict of Colum'bia

Pronunciation: [key]
  1. a federal area in the E United States, on the Potomac, coextensive with the federal capital, Washington. 637,651; 69 sq. mi. (179 sq. km). Abbr.: DC (for use with zip code), D.C.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.