relating to or denoting the style of buildings designed in the 1930s by Frank Lloyd Wright, characterized by inexpensive construction and flat roofs:the Usonian houses of the depression years
noun
a native or inhabitant of the United States:we love life, we Usonians
a house built in the 1930s by Frank Lloyd Wright:the supplement illustrates several Usonians never before published
Usonian in other Oxford dictionaries
Definition of Usonian in the US English dictionary