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District of Columbia

American  

noun

  1. a federal area in the eastern United States, on the Potomac, coextensive with the federal capital, Washington. 69 sq. mi. (179 sq. km). DC (for use with zip code), D.C.


District of Columbia British  

noun

  1. Abbreviation: D.C., DC. a federal district of the eastern US, coextensive with the federal capital, Washington. Pop: 564 326 (2003 est). Area: 178 sq km (69 sq miles)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

District of Columbia Cultural  
  1. The district occupied entirely by Washington, D.C., the capital of the United States; bordered by Maryland to the north and Virginia to the south.


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The District of Columbia was established by acts of Congress in 1790 and 1791 on a site selected by George Washington.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

And this summer, Meta struck a high-profile $18bn settlement with 48 US states, plus the District of Columbia and three US territories.

From BBC ● Oct. 8, 2026

The final, less polite call came from the office of Ed Martin, the acting U.S. attorney for the District of Columbia.

From The Wall Street Journal ● Oct. 2, 2026

In 2024 the District of Columbia sued him for tax fraud in a case Saylor settled for $40 million, making it the largest recovery the city has ever claimed.

From Slate ● Sep. 20, 2026

A 1912 law says new buildings “shall not erected...on public grounds within the District of Columbia without express authority of Congress.”

From Los Angeles Times ● Aug. 31, 2026

“I am glad to find you, sir. I have a telegram here for you all the way from Washington. That’s District of Columbia, sir. Not state of.”

From "The Evolution of Calpurnia Tate" by Jacqueline Kelly

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