master
noun [ C ]
uk/ˈmɑːstər/ us/ˈmæstər/ WORKPLACE, IT
an original of something such as a document, from which copies can be made:
I kept the master and sent my accountant a copy.
a person who is very skilled in a particular job or activity:
a master of sth She is a master of the art of persuasion.
master
adjective [ before noun ]
uk/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
master
verb [ T ]
uk/ˈmɑːstər/ us/ˈmæstər/to learn how to do something well:
It only takes a few hours of practice to master the technique.
They have mastered the art of learning from other people's mistakes.