1alsoWashington, D.C., the District of Columbia, D.C.the capital city of the US, on the Potomac River close to the country's east coast. Washington's many government buildings include the White House, and the Capitol, and the Supreme Court. It has no industry. D.C. stands for District of Columbia, meaning that Washington is a special area that governs itself and is not contained in any of the 50 states.
2the US president and his advisers in the White House:
• Washington is expected to resist pressure to lift trade sanctions on Myanmar.
3alsoWashington StateWAa state in the northwestern US. Its largest cities are Seattle and Tacoma.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.