noun
Washington, D.C.
Refers to the capital city of the United States.
ワシントンD.C.はアメリカの首都です。
Washington, D.C. is the capital of the United States.
noun
Washington (state)
Refers to the U.S. state in the Pacific Northwest.
シアトルはワシントン州にあります。
Seattle is in Washington state.