Definitions of Washingtonian:

• noun:   a resident of the state of Washington
• noun:   a resident of the city of Washington
• adjective:   of or relating to or in the state of Washington
• adjective:   of or relating to the capital of the United States

  Example: "Washingtonian museums"

• adjective:   of or relating to the people who run the federal government

  Example: "Washingtonian politics as usual"

• adjective:   of or relating to or in the manner of George Washington