English

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

 

Mac

 noun
noun
BrE BrE//mæk//
 
; NAmE NAmE//mæk//
 
[singular] (North American English, informal)
 
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used to address a man whose name you do not know Word Origin early 17th cent. (originally a form of address to a Scotsman): from Mac-, a patronymic prefix in many Scots and Irish surnames.