a style of decorative art developed originally in the 1920s with a revival in the 1960s, marked chiefly by geometric motifs, curvilinear forms, sharply defined outlines, often bold colors, and the use of synthetic materials, as plastics.
a style of interior decoration, jewellery, architecture, etc, at its height in the 1930s and characterized by geometrical shapes, stylized natural forms, and symmetrical utilitarian designs adapted to mass production
(as modifier) an Art-Deco carpet
C20: shortened from art décoratif, after the Exposition des arts décoratifs held in Paris in 1925
"decorative and architectural style of the period 19251940" is first attested 1966, from Fr. art décoratif, lit. "decorative art," from L'Exposition Internationale des Arts Décoratifs et Industriels Modernes, held in Paris 1925.