English

Definition of john noun from the Oxford Advanced Learner's Dictionary

 

john

 noun
noun
BrE BrE//dʒɒn//
 
; NAmE NAmE//dʒɑːn//
 
(informal, especially North American English)
 
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a toilet Word Origin early 20th cent. (meaning a prostitute's client): from the given name John, used from late Middle English as a form of address to a man, or to denote various occupations, including that of priest (late Middle English) and policeman (mid 17th cent.).