English

Definition of penny black noun from the Oxford Advanced Learner's Dictionary

 

penny black

 noun
noun
BrE BrE//ˌpeni ˈblæk//
 
; NAmE NAmE//ˌpeni ˈblæk//
 
 
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an old British stamp worth one penny, first used in 1840. It was the first stamp in the world that could be stuck to an envelope.