American English

Definition of art nouveau noun from the Oxford Advanced American Dictionary

 

art nouveau

 noun
(also Art Nouveau) noun
NAmE//ˌɑrt nuˈvoʊ//
 
, NAmE//ˌɑr‑//
 
[uncountable]
 
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a style of decorative art and architecture popular in Europe and the U.S. at the end of the 19th century and beginning of the 20th century, that uses complicated designs and curved patterns based on natural shapes like leaves and flowers
See the Oxford Advanced Learner's Dictionary entry: art nouveau