Edwardian is the term given to the period of British history opening the 20th century when King Edward VII was settled; though it extends from the 1890s until World War I in 1914.
Among its features, the dawn of liberalism, the belief in modern rationality and progress; but it held back on other areas such as arts per say, with the beginning of "Art Deco" in architecture and the end of the "Arts & Crafts" ideals.
Then Artists were influenced by technological advances such as electricity and the automobile. Also the era leaned toward dresses made of lightweight fabrics for a more dynamic lifestyle.
Thereby, the most suitable answer is: "Restrained elegance in art, fashion, and architecture"