a state in the northwestern US, on the Pacific coast, bordered by Canada; population 6,549,224 (est. 2008); capital, Olympia; statehood, Nov. 11, 1889 (42). By agreement with Britain, Washington's northern border was set at the 49th parallel in 1846.
the capital of the US; population 591,833 (est. 2008). It is coextensive with the District of Columbia, a federal district on the Potomac River bordering on the states of Virginia and Maryland. Founded in 1790, during the presidency of George Washington, the city was planned by engineer Pierre-Charles L'Enfant (1754–1825) and built as the capital. Full name Washington, DC.