Definition of notorious adjective from the Oxford Advanced American Dictionary

 

notorious

 adjective
adjective
NAmE//noʊˈtɔriəs//
 
 
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well known for being bad a notorious criminal notorious for something/for doing something The country is notorious for its appalling prison conditions. notorious as something The bar has become notorious as a meeting-place for drug dealers.
notoriously
 
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adverb Mountain weather is notoriously difficult to predict. She is notoriously bad at writing letters. The local bus service is notoriously unreliable.
See the Oxford Advanced Learner's Dictionary entry: notorious