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English definition of “master”

master

adjective [before noun]
 
 
/ˈmɑːstər/ US   /ˈmæstər/
WORKPLACE, IT used to describe the original of something such as a document, from which copies can be made: a master copy/file/list This master disc can be used on any PC.
extremely skilled: a master craftsman/builder/chef
(Definition of master adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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