Nouns

(n)Washingtoniana native or resident of the city of Washington
(n)Washingtoniana native or resident of the state of Washington

Adjectives

(a)Washingtonianof or relating to or in the manner of George Washington
(a)Washingtonianof or relating to the people who run the federal government“Washingtonian politics as usual”
(a)Washingtonianof or relating to the capital of the United States“Washingtonian museums”
(a)Washingtonianof or relating to or in the state of Washington