American English

Definition of best seller noun from the Oxford Advanced American Dictionary

 

best seller

 noun
(also bestseller) noun
NAmE//ˌbɛstˈsɛlər//
 
 
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a product, usually a book, which is bought by large numbers of people Her previous book was a best seller. the best-seller list
best-selling
 
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adjective a best-selling novel/author