American English

Definition of master adjective from the Oxford Advanced American Dictionary

     

    master

     adjective
    adjective
    NAmE//ˈmæstər//
     
    [only before noun]
     
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    skilled
  1. 1 master chef/electrician/mason, etc. used to describe a person who is very skilled at the job mentioned
  2. most important
  3. 2the largest and/or most important the master bedroom a master file/switch
See the Oxford Advanced Learner's Dictionary entry: master