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English definition of “master”

master

noun [C] (COPY)    /ˈmɑː.stər/ US  /ˈmæs.tɚ/
an original version of something from which copies can be made: I sent her a copy and kept the master. You should keep the master copy (= the original) in a safe place.Samples and examples
(Definition of master noun (COPY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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