Definition of past master noun from the Oxford Advanced Learner's Dictionary

 

past master

 noun
noun
BrE
 
; NAmE
 
Clever
 
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past master (at something/at doing something) a person who is very good at something because they have a lot of experience in it synonym expert She's a past master at getting what she wants. See related entries: Clever
See the Oxford Advanced American Dictionary entry: past master